Week of May 19, 2025

Santa Cruz Wharf

Wednesday, May 21, 2025

* Quick HAB Observations *
– Pseudo-nitzschia: Common
– Alexandrium: Rare
– Dinophysis: Present
– Margalefidinium: None

* Impressions *
Beautiful, sunny morning at the wharf.  Phytoplankton biomass decreased slightly and dinoflagellate abundance increased making the net tow a pretty even mix of diatoms and dinoflagellates.  Pseudo-nitzschia and Ceratium were the most abundant this week.  P. australis counts increased 2 orders of magnitude from last week and were a majority of the Pn assemblage.  Alexandrium concentrations decreased.

Dinoflagellates:
C: Ceratium
P: Protoperidinium
P: Prorocentrum
P: Heterocapsa
P: Dinophysis
P: LRB

R: Gymnodinium
R: Akashiwo
R: Alexandrium
R: Gyrodinium
R: Oxyphysis
R: Scrippsiella
R: Pyrocystis
R: Polykrikos
R: Boreadinium

Diatoms:
C: Pseudo-nitzschia
P: Skeletonema
P: Thalassiosira
P: Eucampia
P: Guinardia

R: Chaetoceros
R: Detonula
R: Thalassionema
R: Pleurosigma
R: Asteromphalus
R: Ditylum
R: Asterionellopsis
R: Paralia
R: Rhizosolenia
R: Coscinodiscus
R: Licmophora
R: Odontella
R: Dactyliosolen

Other:
R: Dictyocha

* Environmental Information *
Time: 9:00 am
Collector: M. Conci

Water Conditions (SCW)
Water Temperature: 14.1 C
Water Conditions: Calm
Water Color/Code: Light green, 5G 2/6 (#31)
Water Visibility: 7 ft
Tide: Falling, High – 5:21, 3.7 ft
Surf Report: NW swell, 3-4

NDBC buoy 46236
– Significant wave height: 2.0 m
– Swell height/direction: 1.3 m, NW
– Wind wave height/direction: 1.6 m, NW

Weather Conditions (KudelaHawk)
Sky: Sunny
Air Temperature: 53.4 F (11.9 C)
Wind: 2 mph, E
Solar radiation: 493 watts/m^2

Monterey Wharf II

Wednesday, May 21, 2025

* Quick HAB Observations *
– Pseudo-nitzschia: Abundant
– Alexandrium: Rare
– Dinophysis: Rare
– Margalefidinium: None

* Impressions *
The wharf this morning was cloudy and misting. There was a slight breeze. The surface of the water was relatively calm. Pseudo-nitzschia abundance increased from last week. The water this week was the same color as last week with a visibility of 4.0m. Visually, chlorophyll decreased from last week. Diatoms dominated the water column. Pseudo-nitzschia seriata was abundant (>=50%). Eucampia, Thalassionema, Guinardia, Protoperidinium, and Ceratium were present (1-9%). The HAB species that were observed in the water this morning included Pseudo-nitzschia, Alexandrium, Dinophysis and Akashiwo sanguinea.

Dinoflagellates:
R: Akashiwo sanguinea
R: Prorocentrum spp.
R: Dinophysis spp.
P: Ceratium spp.
R: Gonyaulax spinifera
P: Protoperidinium spp.
R: Alexandrium spp.
R: Scrippsiella spp.
R: Gyrodinium spp.
R: Pyrocystis lunula
R: Pyrophacus spp.
R: Amylax

Diatoms:
R: Chaetoceros spp.
R: Thalassiosira spp.
A: Pseudo-nitzschia spp.
R: Ditylum spp.
P: Guinardia spp.
R: Pleurosigma spp.
R: Rhizosolenia spp.
P: Thalassionema spp.
R: Skeletonema spp.
R: Tropidoneis spp.
R: Navicula spp.
R: Cylindrotheca spp.
R: Licmophora spp.
R: Odontella spp.
R: Asterionellopsis spp.
R: Dactyliosolen spp.
R: Detonula spp.
P: Eucampia
R: Grammatophora

Zooplankton:
R: fecal pellets, nauplii, tintinnids, calanoids, fish larvae, eggs
R: Oligiotrich

* Environmental Information *
TIME: 0739 PT
COLLECTOR: Hannah McGrath

Water Temperature: 13.7°C
Water Conditions: calm waves
Water Color: 5GY 2/2
Visibility: 4.0 m
Tide: Falling, 0.79 m, low at 1213 h

Sky: cloudy/misting, 100% cloud
Air Temperature: 12.2°C
Wind: offline, 2.24 m/S

Rare (R): <1% ~~~ Present (P): 1 – 9% ~~~ Common (C): 10 – 49% ~~~ Abundant (A): >= 50%

Week of May 12, 2025

Santa Cruz Wharf

Wednesday, May 14, 2025

* Quick HAB Observations *
– Pseudo-nitzschia: Common
– Alexandrium: Common
– Dinophysis: Present
– Margalefidinium: None

* Impressions *
Another overcast and cool morning at the wharf.  Phytoplankton biomass increased this week and the net tow remains mostly diatoms, but dinoflagellate abundance increased dramatically from last week.  Pseudo-nitzschia and Eucampia were the most abundant this week.  Pseudo-nitzschia were mostly seriata size and both P. australis and P. multiseries were detected.  Alexandrium cell concentrations also increased (2 orders of magnitude).

Dinoflagellates:
C: Alexandrium
P: Protoperidinium
P: Ceratium
P: Prorocentrum
P: Dinophysis

R: Gymnodinium
R: Akashiwo
R: Heterocapsa
R: Noctiluca
R: Gyrodinium
R: Polykrikos
R: Amylax
R: Boreadinium

Diatoms:
C: Pseudo-nitzschia
C: Skeletonema
C: Thalassiosira
C: Eucampia
P: Guinardia
P: Thalassionema

R: Chaetoceros
R: Dactyliosolen
R: Pleurosigma
R: Asteromphalus
R: Ditylum
R: Asterionellopsis
R: Paralia
R: Rhizosolenia
R: Coscinodiscus
R: Licmophora
R: Odontella
R: Proboscia
R: Tropidoneis

Other:
R: Dictyocha
R: Heterosigma

* Environmental Information *
Time: 8:30 am
Collector: M. Conci

Water Conditions (SCW)
Water Temperature: 13.3 C
Water Conditions: Calm
Water Color/Code: Blue/green, 5BG 2/6 (#15)
Water Visibility: 7 ft
Tide: Rising, Low – 6:34, -0.6 ft
Surf Report: WNW swell, 4-5

NDBC buoy 46236
– Significant wave height: 2.0 m
– Swell height/direction: 1.1 m, WNW
– Wind wave height/direction: 1.7 m, WNW

Weather Conditions (KudelaHawk)
Sky: Overcast
Air Temperature: 52.2 F (11.2 C)
Wind: 2 mph, ESE
Solar radiation: 174 watts/m^2

Monterey Wharf II

Wednesday, May 14, 2025

* Quick HAB Observations *
– Pseudo-nitzschia: Common
– Alexandrium: Rare
– Dinophysis: Rare
– Margalefidinium: None

* Impressions *
The wharf this morning was cloudy and breezy. There were a couple sea lions swimming around the sampling site. The surface of the water was relatively calm. The water this week was more green than last week with a visibility of 4.0m. Chlorophyll increased from last week. Diatoms dominated the water column. Eucampia was abundant ( >= 50%). Pseudo-nitzschia was common (10 – 49%). Guinardia and Thalassionema were present (1 – 9%). The HAB species that were observed in the water this morning included Pseudo-nitzschia, Alexandrium, Dinophysis and Akashiwo sanguinea.

Dinoflagellates:
R: Akashiwo sanguinea
R: Prorocentrum spp.
R: Dinophysis spp.
R: Ceratium spp.
R: Gonyaulax spinifera
R: Protoperidinium spp.
R: Alexandrium spp.
R: Gyrodinium spp. (grey green)
R: Lingulodinium polyedrum
R: Oxyphysis
R: Pyrophacus spp.
R: Amylax

Diatoms:
R: Chaetoceros spp.
R: Thalassiosira spp.
R: Coscinodiscus spp.
C: Pseudo-nitzschia spp.
R: Ditylum spp.
P: Guinardia spp.
R: Pleurosigma spp.
R: Rhizosolenia spp.
P: Thalassionema spp.
R: Skeletonema spp.
R: Hemiaulus spp.
R: Tropidoneis spp.
R: Lauderia spp.
R: Navicula spp.
R: Cylindrotheca spp.
R: Licmophora spp.
R: Odontella spp.
R: Asterionellopsis spp.
R: Proboscia spp.
A: Eucampia
R: Entomoneis

Zooplankton:
R: fecal pellets, nauplii, tintinnids, calanoids, fish larvae, eggs
R: Larvacean
R: Oligiotrich

* Environmental Information *
TIME: 0740 PT
COLLECTOR: Hannah McGrath

Water Temperature: 14.1°C
Water Conditions: relatively calm
Water Color: 5GY 2/2
Visibility: 4.0 m
Tide: Rising, -0.09 m, high at 1353 h

Sky: cloudy skies, 100% cloud
Air Temperature: 12.22°C
Wind: offline, 3.13 m/S

Rare (R): <1% ~~~ Present (P): 1 – 9% ~~~ Common (C): 10 – 49% ~~~ Abundant (A): >= 50%

Week of May 5, 2025

Santa Cruz Wharf

Wednesday, May 7, 2025

* Quick HAB Observations *
– Pseudo-nitzschia: Rare
– Alexandrium: Rare
– Dinophysis: None
– Margalefidinium: None

* Impressions *
Overcast and cool at the wharf this morning.  Phytoplankton biomass decreased this week, but the net tow looked very similar to last week.  Assemblage was mostly diatoms and mostly Skeletonema.  A few Pseudo-nitzschia chains (seriata size) were seen in the net tow, but no P. australis or P. multiseries were detected in the probed counts.  Alexandrium concentration was similar to last week.

Dinoflagellates:
R: Protoperidinium
R: Akashiwo
R: Alexandrium
R: Ceratium
R: Prorocentrum
R: Gymnodinium

Diatoms:
A: Skeletonema
C: Thalassiosira
P: Eucampia
P: Thalassionema

R: Guinardia
R: Chaetoceros
R: Detonula
R: Lauderia
R: Pseudo-nitzschia
R: Pleurosigma
R: Asteromphalus
R: Ditylum
R: Asterionellopsis
R: Paralia
R: Rhizosolenia
R: Coscinodiscus
R: Leptocylindrus
R: Odontella
R: Nitzschia
R: Tropidoneis

Other:
R: Dictyocha

* Environmental Information *
Time: 8:45 am
Collector: A. Trapp

Water Conditions (SCW)
Water Temperature: 13.6 C
Water Conditions: Calm
Water Color/Code: Green, 10GY 2/4 (#30)
Water Visibility: 6 ft
Tide: Falling, High – 7:48, 3.5 ft
Surf Report: WNW swell, 3-5

NDBC buoy 46236
– Significant wave height: 1.1 m
– Swell height/direction: 0.5 m, WNW
– Wind wave height/direction: 1.1 m, WNW

Weather Conditions (KudelaHawk)
Sky: Overcast
Air Temperature: 55.4 F (13.0 C)
Wind: 2 mph, SE
Solar radiation: 90 watts/m^2

Monterey Wharf II

Wednesday, May 7, 2025

* Quick HAB Observations *
– Pseudo-nitzschia: Rare
– Alexandrium: Rare
– Dinophysis: Rare
– Margalefidinium: Rare

* Impressions *
The wharf this morning was cloudy. There was no breeze and the surface of the water was glassy. The water this week was more blue than last week with a visibility of 4.0m. Chlorophyll decreased from last week. Diatoms dominated the water column. Guinardia and Eucampia were common (10-49%). Thalassionema, Ceratium, and Prorocentrum were present (1-9%). The HAB species that were observed in the water this morning included Pseudo-nitzschia, Alexandrium, Dinophysis, Cochlodinium, and Akashiwo sanguinea.

Dinoflagellates:
R: Akashiwo sanguinea
P: Prorocentrum spp.
R: Dinophysis spp.
P: Ceratium spp.
R: Protoperidinium spp.
R: Alexandrium spp.
R: Scrippsiella spp.
R: Gyrodinium spp. (pink tipped)
R: Cochlodinium spp.
R: Oxyphysis
R: Pyrophacus spp.
R: Amylax

Diatoms:
R: Chaetoceros spp.
R: Thalassiosira spp.
R: Coscinodiscus spp.
R: Pseudo-nitzschia spp.
C: Guinardia spp.
R: Rhizosolenia spp.
P: Thalassionema spp.
R: Skeletonema spp.
R: Tropidoneis spp.
R: Lauderia spp.
R: Cylindrotheca spp.
R: Odontella spp.
R: Asterionellopsis spp.
R: Dactyliosolen spp.
R: Detonula spp.
C: Eucampia

Others:
R: Dictyocha spp.
R: Phaeocystis

Zooplankton:
R: fecal pellets, nauplii, tintinnids, calanoids, fish larvae, eggs
R: Oligiotrich

* Environmental Information *
TIME: 0732 PT
COLLECTOR: Hannah McGrath

Water Temperature: 14.1°C
Water Conditions: calm and glassy
Water Color: 5G 2/6
Visibility: 4.0 m
Tide: Rising, 1.10m, high at 0754h

Sky: cloudy, 100% cloud
Air Temperature: 12.5°C
Wind: offline, 0.89m/S

Rare (R): <1% ~~~ Present (P): 1 – 9% ~~~ Common (C): 10 – 49% ~~~ Abundant (A): >= 50%

Week of April 28, 2025

Santa Cruz Wharf

Wednesday, April 30, 2025

* Quick HAB Observations *
– Pseudo-nitzschia: None
– Alexandrium: Rare
– Dinophysis: Present
– Margalefidinium: None

* Impressions *
Another cool and overcast morning at the wharf.  Phytoplankton biomass increased this week and diatoms were the dominant group.  Skeletonema was the most abundant genus.  No Pseudo-nitzschia were observed in the net tow and no P.australis or P. multiseries were detected in the probed counts.  Alexandrium concentrations increased this week.

Dinoflagellates:
P: Protoperidinium
P: Dinophysis

R: Akashiwo
R: Alexandrium
R: Ceratium
R: Prorocentrum
R: Gymnodinium
R: Noctiluca
R: Boreadinium
R: Pyrophacus

Diatoms:
A: Skeletonema
C: Thalassiosira
P: Eucampia
P: Thalassionema
P: Guinardia

R: Chaetoceros
R: Detonula
R: Lauderia
R: Pleurosigma
R: Asteromphalus
R: Ditylum
R: Licmophora
R: Paralia
R: Rhizosolenia
R: Coscinodiscus
R: Odontella
R: Nitzschia

* Environmental Information *
Time: 8:30 am
Collector: M. Conci

Water Conditions (SCW)
Water Temperature: 13.4 C
Water Conditions: Calm
Water Color/Code: Green, 10GY 3/4 (#29)
Water Visibility: 3 ft
Tide: Rising, Low – 7:23, -1.5 ft
Surf Report: WNW swell, 4-5

NDBC buoy 46236
– Significant wave height: 1.3 m
– Swell height/direction: 0.7 m, WNW
– Wind wave height/direction: 1.1 m, WNW

Weather Conditions (KudelaHawk)
Sky: Overcast
Air Temperature: 51.6 F (10.9 C)
Wind: 2 mph, W
Solar radiation: 78 watts/m^2

Monterey Wharf II

Wednesday, April 30, 2025

* Quick HAB Observations *
– Pseudo-nitzschia: Present
– Alexandrium: Rare
– Dinophysis: Rare
– Margalefidinium: None

* Impressions *
The wharf this morning was chilly and cloudy. The surface of the water was calm and glassy. The water this week was greener than last week with a visibility of 5.0 m. Chlorophyll increased from last week. Diatoms dominated the water column. Skeletonema and Chaetoceros were common (10%-49%) in the water. Thalassiosira, Guinardia, Pseudo-nitzschia, Thalassionema, Asterionellopsis, and Eucampia were present (1%-9%). The HAB species that were observed in the water this morning included Pseudo-nitzschia, Alexandrium, Dinophysis and Akashiwo sanguinea.

Dinoflagellates:
R: Akashiwo sanguinea
R: Prorocentrum spp.
R: Dinophysis spp.
R: Ceratium spp.
R: Gonyaulax spinifera
R: Protoperidinium spp.
R: Alexandrium spp.
R: Gyrodinium spp. (pink tipped)
R: Lingulodinium polyedrum
R: Pyrophacus spp.
R: Amylax

Diatoms:
C: Chaetoceros spp.
P: Thalassiosira spp.
R: Coscinodiscus spp.
P: Pseudo-nitzschia spp.
R: Ditylum spp.
P: Guinardia spp.
R: Pleurosigma spp.
R: Rhizosolenia spp.
P: Thalassionema spp.
C: Skeletonema spp.
R: Tropidoneis spp.
R: Lauderia spp.
R: Cylindrotheca spp.
R: Licmophora spp.
R: Odontella spp.
P: Asterionellopsis spp.
R: Detonula spp.
P: Eucampia
R: Entomoneis

Others:
R: Phaeocystis spp. (singletons and clumps)

Zooplankton:
R: fecal pellets, nauplii, tintinnids, calanoids, fish larvae, eggs
R: Oligiotrich
R: Larvacean

* Environmental Information *
TIME: 0811 PT
COLLECTOR: Hannah McGrath

Water Temperature: 13.1°C
Water Conditions: calm/ glassy
Water Color: 5Y 2/2
Visibility: 5.0 m
Tide: Rising, -0.49m, high at 1436 h

Sky: cloudy, 100% cloud
Air Temperature: 11.11°C
Wind: offline, 3.13 m/S

Rare (R): <1% ~~~ Present (P): 1 – 9% ~~~ Common (C): 10 – 49% ~~~ Abundant (A): >= 50%

Week of April 21, 2025

Santa Cruz Wharf

Wednesday, April 23, 2025

* Quick HAB Observations *
– Pseudo-nitzschia: Present
– Alexandrium: Rare
– Dinophysis: None
– Margalefidinium: None

* Impressions *
It was a cool and overcast morning at the wharf.  Phytoplankton biomass decreased from last week along with a decrease in dinoflagellate abundance.  Net tow was mostly diatoms and Skeletonema was the most abundant this week.  Pseudo-nitzschia decreased in abundance this week and the P. australis counts dropped an order of magnitude.  The Alexandrium concentration decreased as well.

Dinoflagellates:
R: Akashiwo
R: Protoperidinium
R: Alexandrium
R: Ceratium
R: Prorocentrum
R: Gymnodinium
R: Noctiluca
R: Polykrikos
R: Boreadinium
R: Amylax

Diatoms:
A: Skeletonema
P: Pseudo-nitzschia
P: Eucampia
P: Thalassiosira
P: Thalassionema

R: Chaetoceros
R: Guinardia
R: Detonula
R: Lauderia
R: Asterionellopsis
R: Pleurosigma
R: Asteromphalus
R: Ditylum
R: Licmophora
R: Paralia
R: Rhizosolenia
R: Coscinodiscus
R: Tropidoneis
R: Entomoneis

* Environmental Information *
Time: 8:30 am
Collector: M. Conci

Water Conditions (SCW)
Water Temperature: 12.7 C
Water Conditions: Calm
Water Color/Code: Green, 10GY 3/4 (#29)
Water Visibility: 5 ft
Tide: Falling, High – 7:02, 4.2 ft
Surf Report: NW swell, 4-5

NDBC buoy 46236
– Significant wave height: 1.8 m
– Swell height/direction: 0.8 m, WNW
– Wind wave height/direction: 1.7 m, WNW

Weather Conditions (KudelaHawk)
Sky: Overcast
Air Temperature: 51.4 F (10.8 C)
Wind: 1 mph, SSW
Solar radiation: 138 watts/m^2

Monterey Wharf II

Wednesday, April 23, 2025

* Quick HAB Observations *
– Pseudo-nitzschia: Common
– Alexandrium: Rare
– Dinophysis: Rare
– Margalefidinium: None

* Impressions *
The wharf this morning was chilly and cloudy with a slight drizzle. The surface of the water was relatively calm and covered with melting ice from a truck unloading fish. There were lots of birds. The water this week was more blue than last week with a visibility > 5.0m. Diatoms dominated the water column. Chaetoceros, Skeletonema, Thalassiosira, and Pseudo-nitzschia were common (10-49%). Thalassionema and Asterionellopsis were present (1-9%) The HAB species that were observed in the water this morning included Pseudo-nitzschia, Dinophysis and Akashiwo sanguinea.

Dinoflagellates:
R: Akashiwo sanguinea
R: Dinophysis spp.
R: Ceratium spp.
R: Gonyaulax spinifera
R: Protoperidinium spp.
R: Alexandrium spp.
R: Gyrodinium spp. (pink tipped)
R: Polykrikos spp.
R: Pyrophacus spp.
R: Amylax

Diatoms:
C: Chaetoceros spp.
C: Thalassiosira spp.
R: Coscinodiscus spp.
C: Pseudo-nitzschia spp.
R: Ditylum spp.
R: Guinardia spp.
R: Pleurosigma spp.
R: Rhizosolenia spp.
P: Thalassionema spp.
C: Skeletonema spp.
R: Tropidoneis spp.
R: Lauderia spp.
R: Navicula spp.
R: Cylindrotheca spp.
P: Asterionellopsis spp.
R: Stephanopyxis spp.
R: Detonula spp.
R: Eucampia
R: Entomoneis

Others:
R: Dictyocha spp.

Zooplankton:
R: fecal pellets, nauplii, tintinnids, calanoids, fish larvae, eggs
R: oligiotrich

* Environmental Information *
TIME: 0822 PT
COLLECTOR: Hannah McGrath

Water Temperature: 13.0°C
Water Conditions: calm
Water Color: 5G 2/6
Visibility: > 5.0 m
Tide: Falling, 1.31m, low at 1355 h

Sky: cloudy/dark, 100% cloud
Air Temperature: 11.11°C
Wind: offline, 3.58 m/S

Rare (R): <1% ~~~ Present (P): 1 – 9% ~~~ Common (C): 10 – 49% ~~~ Abundant (A): >= 50%

Week of April 14, 2025

Santa Cruz Wharf

Wednesday, April 16, 2025

* Quick HAB Observations *
– Pseudo-nitzschia: Common
– Alexandrium: None
– Dinophysis: Rare
– Margalefidinium: Rare

* Impressions *
Sunny and cool at the wharf this morning.  Phytoplankton biomass increased again this week along with an increase in dinoflagellate abundance.  Akashiwo and Pseudo-nitzschia (seriata size) were the most abundant in the net tow. P. australis concentrations increased from last week, with no P. multiseries detected.  Alexandrium concentrations also increased this week

Dinoflagellates:
C: Akashiwo

R: Protoperidinium
R: Dinophysis
R: Ceratium
R: Prorocentrum
R: Gymnodinium
R: Noctiluca
R: Polykrikos
R: Margalefidinium

Diatoms:
C: Pseudo-nitzschia
C: Eucampia
C: Leptocylindrus
P: Chaetoceros
P: Guinardia
P: Thalassiosira
P: Detonula
P: Lauderia
P: Thalassionema

R: Skeletonema
R: Asterionellopsis
R: Pleurosigma
R: Asteromphalus
R: Ditylum
R: Rhizosolenia
R: Lithodesmium
R: Odontella
R: Thalassiothrix
R: Coscinodiscus
R: Tropidoneis
R: Entomoneis

Other:
R: Phaeocystis

* Environmental Information *
Time: 8:30 am
Collector: M. Conci

Water Conditions (SCW)
Water Temperature: 12.2 C
Water Conditions: Calm
Water Color/Code: Green, 10GY 3/4 (#29)
Water Visibility: 7 ft
Tide: Rising, Low – 7:32, -0.1 ft
Surf Report: NW swell, 4-6

NDBC buoy 46236
– Significant wave height: 1.3 m
– Swell height/direction: 0.9 m, WNW
– Wind wave height/direction: 1.0 m, WNW

Weather Conditions (KudelaHawk)
Sky: Sunny
Air Temperature: 50.9 F (10.5 C)
Wind: 2 mph, N
Solar radiation: 298 watts/m^2

Monterey Wharf II

Wednesday, April 16, 2025

* Quick HAB Observations *
– Pseudo-nitzschia: Common
– Alexandrium: None
– Dinophysis: Rare
– Margalefidinium: None

* Impressions *
The wharf this morning was breezy and partly cloudy. The surface of the water was smooth and calm. The water this week was less brown but more green than last week with increased visibility of 5.0m. Chlorophyll decreased from last week. .Akashiwo significantly decreased from last week. Diatoms dominated the water column. Skeletonema and Pseudo-nitzschia were common (10-49%). Eucampia, Chaetoceros, Thalassiosira, Guinardia, Detonula, and Akashiwo were present (1-9%). The HAB species that were observed in the water this morning included Pseudo-nitzschia, Dinophysis and Akashiwo sanguinea.

Dinoflagellates:
P: Akashiwo sanguinea
R: Dinophysis spp.
R: Ceratium spp.
R: Gonyaulax spinifera
R: Protoperidinium spp.
R: Gyrodinium spp. (pink tipped)
R: Polykrikos spp.
R: Pyrophacus spp.
R: Amylax

Diatoms:
P: Chaetoceros spp.
P: Thalassiosira spp.
R: Coscinodiscus spp.
C: Pseudo-nitzschia spp.
R: Ditylum spp.
P: Guinardia spp.
R: Pleurosigma spp.
R: Rhizosolenia spp.
R: Thalassionema spp.
C: Skeletonema spp.
R: Tropidoneis spp.
R: Lauderia spp.
R: Navicula spp.
R: Cylindrotheca spp.
R: Leptocylindrus spp.
R: Asterionellopsis spp.
P: Detonula spp.
P: Eucampia
R: Entomoneis
R: Lioloma

Zooplankton:
R: fecal pellets, nauplii, tintinnids, calanoids, fish larvae, eggs

* Environmental Information *
TIME: 0646 PT
COLLECTOR: Hannah McGrath

Water Temperature: 11.9°C
Water Conditions: smooth/calm surface
Water Color: 10Y 2/2
Visibility: 5.0 m
Tide: Falling, 0.0m, low at 0743 h

Sky: sunny/partly cloudy, 50% cloud
Air Temperature: 10.0°C
Wind: offline, 2.24 m/s

Rare (R): <1% ~~~ Present (P): 1 – 9% ~~~ Common (C): 10 – 49% ~~~ Abundant (A): >= 50%

Week of April 7, 2025

Santa Cruz Wharf

Wednesday, April 9, 2025

* Quick HAB Observations *
– Pseudo-nitzschia: Common
– Alexandrium: None
– Dinophysis: Rare
– Margalefidinium: None

* Impressions *
Another lovely and sunny morning at the wharf.  Net tow remains mostly diatoms with a decrease in dinoflagellate abundance.  Phytoplankton biomass increased this week and the phytoplankton assemblage shifted slightly with Skeletonema and Pseudo-nitzschia (seriata size) being the most abundant.  P. australis concentrations increased an order of magnitude and no P. multiseries were detected.  Alexandrium concentration decreased from last week.

Dinoflagellates:
R: Protoperidinium
R: Dinophysis
R: Ceratium
R: Prorocentrum
R: Gymnodinium
R: Noctiluca
R: Boreadinium
R: LRB

Diatoms:
C: Skeletonema
C: Pseudo-nitzschia
C: Dactyliosolen
C: Leptocylindrus
C: Chaetoceros
P: Guinardia
P: Thalassiosira
P: Detonula
P: Eucampia

R: Lauderia
R: Thalassionema
R: Paralia
R: Asterionellopsis
R: Pleurosigma
R: Asteromphalus
R: Ditylum
R: Rhizosolenia
R: Lithodesmium
R: Odontella
R: Thalassiothrix
R: Coscinodiscus

Other:
R: Phaeocystis

* Environmental Information *
Time: 9:40 am
Collector: K. Negrey

Water Conditions (SCW)
Water Temperature: 13.7 C
Water Conditions: Calm
Water Color/Code: Green, 10GY 3/4 (#29)
Water Visibility: 5 ft
Tide: Falling, High – 8:57, 4.2 ft
Surf Report: WNW swell, 4-6

NDBC buoy 46236
– Significant wave height: 1.8 m
– Swell height/direction: 1.4 m, WNW
– Wind wave height/direction: 1.2 m, WNW

Weather Conditions (KudelaHawk)
Sky: Sunny
Air Temperature: 55.9 F (13.3 C)
Wind: 4 mph, E
Solar radiation: 479 watts/m^2

Monterey Wharf II

Wednesday, April 9, 2025

* Quick HAB Observations *
– Pseudo-nitzschia: Present
– Alexandrium: None
– Dinophysis: Present
– Margalefidinium: None

* Impressions *
The wharf was sunny with clear skies. There were lots of birds on the surface of the water. There was an Akashwio bloom! The biomass clogged my phytoplankton net this morning. The water this week was significantly more red/brown than last week with a visibility of 2.0m. Visually chlorophyll increased from last week. Dinoflagellates dominated the water column. Akashiwo was abundant (>=50%). Thalassiosira, Pseudo-nitzschia, Dinophysis, Prorocentrum, and Ceratium were present (1-10%). The HAB species that were observed in the water this morning included Pseudo-nitzschia, Dinophysis and Akashiwo sanguinea.

Dinoflagellates:
A: Akashiwo sanguinea
P: Prorocentrum spp.
P: Dinophysis spp.
P: Ceratium spp.
R: Pyrophacus spp.
R: Amylax

Diatoms:
R: Chaetoceros spp.
P: Thalassiosira spp.
R: Coscinodiscus spp.
P: Pseudo-nitzschia spp.
R: Ditylum spp.
R: Guinardia spp.
R: Pleurosigma spp.
R: Skeletonema spp.
R: Tropidoneis spp.
R: Lauderia spp.
R: Leptocylindrus spp.
R: Eucampia

Zooplankton:
R: fecal pellets, nauplii, tintinnids, calanoids, fish larvae, eggs
R: Oligiotrich

* Environmental Information *
TIME: 0715 PT
COLLECTOR: Hannah McGrath

Water Temperature: 14.0°C
Water Conditions: calm
Water Color: 5Y 2/2 *note the water color was more brown/red
Visibility: 2.0 m
Tide: Rising, 1.10 m, high at 0903 h

Sky: sunny/ clear skies, 0% cloud
Air Temperature: 11.11°C
Wind: offline, 1.34m/S

Rare (R): <1% ~~~ Present (P): 1 – 9% ~~~ Common (C): 10 – 49% ~~~ Abundant (A): >= 50%

Week of March 31, 2025

Santa Cruz Wharf

Wednesday, April 2, 2025

* Quick HAB Observations *
– Pseudo-nitzschia: Present
– Alexandrium: None
– Dinophysis: Rare
– Margalefidinium: None

* Impressions *
Sunny at the wharf this morning with lots of rafting CSLs in the sample area.  Phytoplankton biomass decreased this week and the net tow remains mostly diatoms.  The assemblage shifted again to mostly Skeletonema, but Pseudo-nitzschia (both size classes) were still around.  P. australis concentration decreased an order of magnitude and no P. multiseries were detected.  Alexandrium were not seen in the net tow, but cell concentration increased from last week.

Dinoflagellates:
P: Akashiwo
P: Protoperidinium

R: Dinophysis
R: Ceratium
R: Prorocentrum
R: Gymnodinium
R: Polykrikos
R: Noctiluca
R: Boreadinium
R: LRB

Diatoms:
C: Skeletonema
C: Dactyliosolen
C: Leptocylindrus
P: Pseudo-nitzschia
P: Guinardia
P: Chaetoceros
P: Thalassiosira
P: Lauderia
P: Thalassionema
P: Paralia

R: Detonula
R: Asterionellopsis
R: Pleurosigma
R: Proboscia
R: Asteromphalus
R: Eucampia
R: Ditylum
R: Rhizosolenia
R: Lithodesmium
R: Odontella
R: Actinoptychus
R: Coscinodiscus
R: Licmophora
R: Entomoneis

Other:
R: Phaeocystis
R: Dictyocha

* Environmental Information *
Time: 10:30 am
Collector: K. Negrey

Water Conditions (SCW)
Water Temperature: 13.0 C
Water Conditions: Calm
Water Color/Code: Blue/green, 5G 2/6 (#31)
Water Visibility: 5 ft
Tide: Rising, Low – 8:39, -0.8 ft
Surf Report: WNW swell, 4-5

NDBC buoy 46236
– Significant wave height: 2.7 m
– Swell height/direction: 1.7 m, WNW
– Wind wave height/direction: 2.1 m, WNW

Weather Conditions (KudelaHawk)
Sky: Sunny
Air Temperature: 54.7 F (12.6 C)
Wind: 8 mph, WSW
Solar radiation: 638 watts/m^2

Monterey Wharf II

Wednesday, April 2, 2025

* Quick HAB Observations *
– Pseudo-nitzschia: Common
– Alexandrium: Rare
– Dinophysis: Rare
– Margalefidinium: None

* Impressions *
The wharf this morning was pretty windy. The surface waters were wavy. The skies were blue without a cloud in the sky. The water this week was a lighter green than last week with a visibility of 4.0m. Unlike last week, diatoms dominated the water column. Chaetoceros was abundant in the water. Skeletonema, Pseudo-nitzschia, and Akashiwo were common. The HAB species that were observed in the water this morning included Pseudo-nitzschia, Alexandrium, Dinophysis and Akashiwo sanguinea.

Dinoflagellates:
C: Akashiwo sanguinea
R: Prorocentrum spp.
R: Dinophysis spp.
R: Ceratium spp.
R: Protoperidinium spp.
R: Alexandrium spp.
R: Gyrodinium spp.
R: Lingulodinium polyedrum
R: Pyrophacus spp.
R: Amylax

Diatoms:
A: Chaetoceros spp.
R: Thalassiosira spp.
R: Coscinodiscus spp.
C: Pseudo-nitzschia spp.
R: Ditylum spp.
R: Guinardia spp.
R: Pleurosigma spp.
R: Thalassionema spp.
C: Skeletonema spp.
R: Tropidoneis spp.
R: Lauderia spp.
R: Navicula spp.
R: Cylindrotheca spp.
R: Licmophora spp.
R: Odontella spp.
R: Leptocylindrus spp.
R: Asterionellopsis spp.
R: Detonula spp.
R: Eucampia
R: Lioloma
R: Grammatophora

Zooplankton:
R: fecal pellets, nauplii, tintinnids, calanoids, fish larvae, eggs
R: Mesodinium
R: Oligiotrich

* Environmental Information *
TIME: 0755 PT
COLLECTOR: Hannah McGrath

Water Temperature: 12.1°C
Water Conditions: wavy
Water Color: 5GY 3/4
Visibility: 4.0 m
Tide: Falling, -0.21 m, low at 0850 h

Sky: sunny/ clear skies, 0% cloud
Air Temperature: 10.0°C
Wind: offline, 5.36 m/S

Rare (R): <1% ~~~ Present (P): 1 – 9% ~~~ Common (C): 10 – 49% ~~~ Abundant (A): >= 50%

Week of March 24, 2025

Santa Cruz Wharf

Wednesday, March 26, 2025

* Quick HAB Observations *
– Pseudo-nitzschia: Common
– Alexandrium: Rare
– Dinophysis: Present
– Margalefidinium: None

* Impressions *
Overcast and drizzly at the wharf this morning with seabirds feeding off of Main Beach.  Net tow was similar to last week – mostly diatoms with an increase in dinoflagellates.  Phytoplankton biomass was about the same however, the assemblage shifted again and Pseudo-nitzschia were the most abundant.  The P. multiseries concentration increased slightly while the P. australis concentration increased an order of magnitude.  Alexandrium cells were also observed in the net tow and the probed counts.

Dinoflagellates:
P: Protoperidinium
P: Dinophysis

R: Ceratium
R: Prorocentrum
R: Alexandrium
R: Akashiwo
R: Polykrikos
R: Noctiluca
R: Boreadinium
R: LRB

Diatoms:
C: Pseudo-nitzschia
C: Dactyliosolen
C: Leptocylndrus
C: Skeletonema
P: Guinardia
P: Chaetoceros
P: Thalassiosira
P: Detonula

R: Asterionellopsis
R: Lauderia
R: Pleurosigma
R: Proboscia
R: Asteromphalus
R: Eucampia
R: Thalassionema
R: Ditylum
R: Rhizosolenia

* Environmental Information *
Time: 7:45 am
Collector: A. Trapp

Water Conditions (SCW)
Water Temperature: 12.5 C
Water Conditions: Choppy w/ swell
Water Color/Code: Blue/green, 10G 3/6 (#32)
Water Visibility: 5 ft
Tide: Rising, High – 8:23, 4.9 ft
Surf Report: WNW swell, 4-6

NDBC buoy 46236
– Significant wave height: 1.8 m
– Swell height/direction: 1.5 m, WNW
– Wind wave height/direction: 1.1 m, WNW

Weather Conditions (KudelaHawk)
Sky: Overcast, drizzling
Air Temperature: 52.2 F (11.2 C)
Wind: 2 mph, SE
Solar radiation: 5 watts/m^2

Monterey Wharf II

Wednesday, March 26, 2025

* Quick HAB Observations *
– Pseudo-nitzschia: Rare
– Alexandrium: Rare
– Dinophysis: Present
– Margalefidinium: None

* Impressions *
The wharf this morning was cloudy and misting. Unlike yesterday, it was warm and sunny with a high of 77°F. There were many sea lions jumping out of the water. In addition, there were unusually more seabirds swarming near shore and moving offshore. The surface of the water had kelp and bird feathers. The water this week was a slightly lighter green than last week with a visibility of 4.0m. Chlorophyll decreased from last week. Dinoflagellates dominated the water column. Akashiwo abundance significantly increased from last week. Akashiwo was abundant (=> 50%) in the water. Dinophysis, Protoperidinium, and Prorocentrum were present (1-10%). The HAB species that were observed in the water this morning included Pseudo-nitzschia, Alexandrium, Dinophysis and Akashiwo sanguinea.

Dinoflagellates:
A: Akashiwo sanguinea
P: Prorocentrum spp.
P: Dinophysis spp.
R: Ceratium spp.
P: Protoperidinium spp.
R: Alexandrium spp.
R: Gyrodinium spp. (pink tipped)
R: Polykrikos spp.
R: Pyrophacus spp.
R: Amylax

Diatoms:
R: Chaetoceros spp.
R: Thalassiosira spp.
R: Coscinodiscus spp.
R: Pseudo-nitzschia spp.
R: Guinardia spp.
R: Pleurosigma spp.
R: Thalassionema spp.
R: Skeletonema spp.
R: Navicula spp.
R: Licmophora spp.
R: Asteromphalus spp.
R: Leptocylindrus spp.
R: Eucampia
R: Entomoneis

Zooplankton:
R: Oligiotrich
R: fecal pellets, nauplii, tintinnids, calanoids, fish larvae, eggs

* Environmental Information *
TIME: 0814 PT
COLLECTOR: Hannah McGrath

Water Temperature: 14.0°C
Water Conditions: relatively calm
Water Color: 10GY 2/4
Visibility: 4.0 m
Tide: Rising, 2.01m, high at 0829 h

Sky: cloudy/misty, 100% cloud
Air Temperature: 12.22°C
Wind: offline, 1.34m/S

Rare (R): <1% ~~~ Present (P): 1 – 9% ~~~ Common (C): 10 – 49% ~~~ Abundant (A): >= 50%

Week of March 17, 2025

Santa Cruz Wharf

Wednesday, March 19, 2025

* Quick HAB Observations *
– Pseudo-nitzschia: Present
– Alexandrium: None
– Dinophysis: Rare
– Margalefidinium: Rare

* Impressions *
Mostly sunny and cold at the wharf this morning.  Net tow was mostly diatoms and phytoplankton biomass decreased this week.  Phytoplankton assemblage shifted slightly with Chaetoceros decreasing and Skeletonema being the most abundant.  No Alexandrium were observed this week.  Pseudo-nitzschia were mostly seriata size (handful of deli-size).  P. australis and P. multiseries were detected in the probed counts this week and concentrations increased 2 orders of magnitude.

Dinoflagellates:
R: Ceratium
R: Protoperidinium
R: Dinophysis
R: Prorocentrum
R: Gyrodinium
R: Margalefidinium
R: Polykrikos

Diatoms:
A: Skeletonema
C: Chaetoceros
P: Thalassiosira
P: Asterionellopsis
P: Pseudo-nitzschia

R: Detonula
R: Lauderia
R: Coscinodiscus
R: Pleurosigma
R: Proboscia
R: Asteromphalus
R: Eucampia
R: Guinardia
R: Dactyliosolen
R: Paralia
R: Thalassionema
R: Ditylum
R: Rhizosolenia
R: Actinoptychus
R: Entomoneis

* Environmental Information *
Time: 8:15 am
Collector: P. Daniel

Water Conditions (SCW)
Water Temperature: 12.0 C
Water Conditions: Small swell
Water Color/Code: Green, 10G 2/6 (#12)
Water Visibility: 5 ft
Tide: Falling, Low – 8:51, 0.6 ft
Surf Report: WNW swell, 3-4

NDBC buoy 46236
– Significant wave height: 2.2 m
– Swell height/direction: 1.8 m, WNW
– Wind wave height/direction: 1.4 m, WNW

Weather Conditions (KudelaHawk)
Sky: Partly cloudy
Air Temperature: 42.3 F (5.7 C)
Wind: 8 mph, W
Solar radiation: 132 watts/m^2

Monterey Wharf II

Wednesday, March 19, 2025

* Quick HAB Observations *
– Pseudo-nitzschia: Common
– Alexandrium: Rare
– Dinophysis: Rare
– Margalefidinium: None

* Impressions *
The wharf this morning was sunny with clear skies. The wharf was relatively warm and there was no breeze. There were several fishermen at the wharf. The water this week was a slightly lighter green than last week with a visibility of 5.5m. Visually chlorophyll decreased slightly from last week. Diatoms dominated the water column. Chaetoceros, Pseudo-nitzschia, and Skeletonema were common (10-49%). Proboscia and Akashiwo were present (1-10%). The HAB species that were observed in the water this morning included Pseudo-nitzschia, Alexandrium, Dinophysis and Akashiwo sanguinea.

Dinoflagellates:
P: Akashiwo sanguinea
R: Prorocentrum spp.
R: Dinophysis spp.
R: Ceratium spp.
R: Protoperidinium spp.
R: Alexandrium spp.
R: Gyrodinium spp.
R: Lingulodinium polyedrum
R: Amylax

Diatoms:
C: Chaetoceros spp.
R: Thalassiosira spp.
R: Coscinodiscus spp.
C: Pseudo-nitzschia spp.
R: Ditylum spp.
R: Guinardia spp.
R: Pleurosigma spp.
R: Rhizosolenia spp.
R: Thalassionema spp.
C: Skeletonema spp.
R: Lauderia spp.
R: Navicula spp.
R: Cylindrotheca spp.
R: Licmophora spp.
R: Odontella spp.
R: Leptocylindrus spp.
R: Asterionellopsis spp.
R: Stephanopyxis spp.
R: Cerataulina spp.
R: Proboscia spp.
R: Detonula spp.
R: Eucampia
R: Entomoneis
R: Lioloma
R: Grammatophora

Zooplankton:
R: fecal pellets, nauplii, tintinnids, calanoids, fish larvae, eggs

* Environmental Information *
TIME: 0832 PT
COLLECTOR: Hannah McGrath

Water Temperature: 12.1°C
Water Conditions: calm
Water Color: 5Y 2/2
Visibility: 5.5 m
Tide: Falling, 0.21 m, low at 0902 h

Sky: sunny/ clear skies, 5% cloud
Air Temperature: 8.06°C
Wind: offline, 1.34m/S

Rare (R): <1% ~~~ Present (P): 1 – 9% ~~~ Common (C): 10 – 49% ~~~ Abundant (A): >= 50%