General Information

Event name: SYC-15-001
Nature of the harmful event:
Water Discoloration , High Phyto concentration , Mass mortalities
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: No
Event occurred before in this location: No
Individuals to contact: QUOD, Jean-Pascal

Location & Date

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Location: Latitude: -4.330556, Longitude: 55.662778
General location information: Cousin Island, Seychelles
HAB Area code(s): SYC-001
Additional location information: All around Cousin Island
Bloom event dates (yyyy/mm/dd): Start: 2015-10-23, End: 2015-10-26
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Cochlodinium polykrikoides ( cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography: Cousin Island special reserve report on algal bloom, October 2015, compiled by Cheryl Sanchez.

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: Oxygen content (nL/L): Wind velocity:
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: Current Velocity:
Nutrient information:
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event:
Bloom location in the water column: Whole column
In situ
Growth Comments
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: Type of kit used:
Additional information:
Economic losses: unknown
Management decision:
Additional harmful effect information: Dead fish found all around the island.
Created at 10:20 on 2 Nov 2017
Updated at 10:21 on 2 Nov 2017