General Information

Event name: MY-16-001
Nature of the harmful event:
Water Discoloration , High Phyto concentration , Mass mortalities
Event directly affected:
Natural Fish
Toxicity detected: No
Associated syndrome: OTHER
Unexplained toxicity: Yes (ichthyotoxicity)
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: No
Event occurred before in this location: No
Individuals to contact: Lim, Po Teen , Leaw, Chui Pin

Location & Date

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Location: Latitude: 6.009167, Longitude: 102.425556
General location information: Pantai Melawi, Bachok, Kelantan
HAB Area code(s): MY-1
Additional location information:
Bloom event dates (yyyy/mm/dd): Event Date:2016-03-26
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Chattonella sp. (143000 cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: New species of Chattonella
Event-related bibliography: Leaw CP. et al. 2018. Characterizing the raphidophyte Chattonella sp. associated with massive fish mortality on the east coast of Peninsular Malaysia. ICHA2018, Nantes, France, Abstract.

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:
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:
Management decision:
Additional harmful effect information:
Created at 09:31 on 20 Oct 2019
Updated at 10:53 on 20 Oct 2019