Santa Cruz Wharf
Wednesday, December 10, 2025
* Quick HAB Observations *
– Pseudo-nitzschia: Common
– Alexandrium: None
– Dinophysis: None
– Margalefidinium: Rare
* Impressions *
Sunny and cool at the wharf this morning and water visibility was >10ft. Detritus/debris in the net tow decreased this week and phytoplankton biomass increased. The assemblage remains mostly diatoms and Chaetoceros was the most abundant. Pseudo-nitzschia were seriata size. There were no P. australis (or Alexandrium), but P. multiseries were detected this week.
Dinoflagellates:
R: Prorocentrum
R: Akashiwo
R: Margalefidinium
R: Protoperidinium
R: Gonyaulax
R: LRB
Diatoms:
A: Chaetoceros
C: Thalassiosira
C: Pseudo-nitzschia
P: Detonula
P: Skeletonema
P: Lauderia
P: Thalassionema
R: Lithodesmium
R: Paralia
R: Pleurosigma
R: Coscinodiscus
R: Rhizosolenia
R: Stephanopyxis
R: Eucampia
R: Ditylum
Other:
R: Phaeocystis
* Environmental Information *
Time: 8:30 am
Collector: M Conci
Water Conditions (SCW)
Water Temperature: 13.3 C
Water Conditions: Calm
Water Color/Code: Green, 10GY 3/4 (#29)
Water Visibility: +10 ft
Tide: Low – 8:38, 2.9 ft
Surf Report: WNW swell, 3-4 ft
NDBC buoy 46236
– Significant wave height: 1.7 m
– Swell height/direction: 1.1 m, WNW
– Wind wave height/direction: 1.2 m, WNW
Weather Conditions (KudelaHawk)
Sky: Sunny
Air Temperature: 47.7 F (8.7 C)
Wind: 3 mph, W
Solar radiation: 150 watts/m^2
Monterey Wharf II
Wednesday, December 10, 2025
* Quick HAB Observations *
– Pseudo-nitzschia: Present
– Alexandrium: Rare
– Dinophysis: Rare
– Margalefidinium: Rare
* Impressions *
It was cloudless and sunny at the wharf this morning with a very light breeze. The water surface was calm with gentle waves, and visibility was about 4.5 m. Diatoms dominated the water column. Chaetoceros and Thalassiosira were common (10 – 49%). Pseudo-nitzschia, Prorocentrum, Pleurosigma, Detonula, Ceratium, and Ditylum 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: Gonyaulax spinifera
R: Protoperidinium spp.
R: Alexandrium spp.
R: Scrippsiella spp.
R: Polykrikos spp.
R: Cochlodinium spp.
R: Gymnodinium spp
Diatoms:
C: Chaetoceros spp.
C: Thalassiosira spp.
P: Pseudo-nitzschia spp.
P: Ditylum spp.
R: Lithodesmium spp.
P: Pleurosigma spp.
R: Rhizosolenia spp.
R: Thalassionema spp.
R: Skeletonema spp.
R: Corethron spp.
R: Lauderia spp.
R: Navicula spp.
R: Cylindrotheca spp.
R: Leptocylindrus spp.
R: Stephanopyxis spp.
P: Detonula spp.
R: Eucampia
Others:
R: Dictyocha spp.
R: Phaeocystis spp. (singletons and clumps)
R: Acantharians
Zooplankton:
R: fecal pellets, nauplii, tintinnids, calanoids, fish larvae, eggs
* Environmental Information *
TIME: 0820 PT
COLLECTOR: Elise Tysdal
Water Temperature: 13°C
Water Conditions: calm
Water Color: 10GY 2/4
Visibility: 4.5 m
Tide: Falling then rising, 0.91 m, high at 0849 h
Sky: sunny, 0% cloud
Air Temperature: 11.67°C
Wind: offline, 4.02m/S
Rare (R): <1% ~~~ Present (P): 1 – 9% ~~~ Common (C): 10 – 49% ~~~ Abundant (A): >= 50%