General Information

Event name: US-03-003
Nature of the harmful event:
Water Discoloration , High Phyto concentration , Foam/Mucilage in the coast , Other ( High densities of Lingulodinium polydedrum observed by volunteer network)
Event directly affected:
Natural Fish
Toxicity detected: No
Associated syndrome:
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (California Department of Health Services' Marine Biotoxin Monitoring Program)
Event occurred before in this location: Yes
Individuals to contact: LANGLOIS, Gregg

Location & Date

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Location: Latitude: , Longitude:
General location information: , California, Southern California.
HAB Area code(s): US-20
Additional location information:
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Detection date: 9/03 Final date: 12/03.


Causative organism known: Yes
Causative Species/Genus: Lingulodinium polyedra ( cells/L)
Qualitative observations of bloom.
Co-Ocurring Species/Genus: Ceratium sp. ( cells/L)
Prorocentrum sp. ( cells/L)
Protoperidinium sp. ( cells/L)
Chlorophyll concentration, if known: µg/l
Additional bloom information: Few dinoflagellates (Ceratium, Prorocentrum, Protoperidinium): almost 100% monospecific bloom of L. Polyedrum.
Event-related bibliography:

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: No Oxygen content (nL/L): Wind velocity:
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: Current Velocity: 0
Nutrient information:
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event:
Bloom location in the water column:
Growth Comments
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: No Type of kit used:
Additional information:
Economic losses:
Management decision:
Additional harmful effect information: Massive red tide along the Southern California coast, from Santa Barbara through San Diego, from September through December. Witnesses reported the depth of the bloom to exceed 50 feet in the San Diego coastal area.