General Information

Event name: KR-03-001
Nature of the harmful event:
Water Discoloration , High Phyto concentration , Mass mortalities
Event directly affected:
Natural Fish , Aquaculture Fish
Toxicity detected: No
Associated syndrome: OTHER
Unexplained toxicity:
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (NFRDI/Korea-HAB monitoring program)
Event occurred before in this location: Yes (This bloom has been initiated in this area in August since 1995.)
Individuals to contact: Kang, Y.S.

Location & Date

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Location: Latitude: 34.583056, Longitude:
General location information: Jeonnam province, Yeosu
HAB Area code(s): KR-04
Additional location information: patch with 10-100km length and 500m width
Bloom event dates (yyyy/mm/dd): Event Date:2003-08-24
Start: 2003-08-02, End: 2003-09-27
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Cochlodinium polykrikoides (48000000 cells/L)
monospecific bloom
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: 15 µg/l
Additional bloom information:
Event-related bibliography: Details in daily HABs newsletter issued by NFRDI and webpage (http//

Environmental Conditions

Weather: fine Turbidity (NTU): Wind direction: SE
Stratified water: No Oxygen content (nL/L): Wind velocity:
Temperature (°C): 22.6-27.6 Oxygen saturation %: Current Direction:
Sechhi disk (m): 3-5 Salinity: 33 Current Velocity: 1
Nutrient information: PHOSPHATE: 0.1-0.3uM
DIN: 5-20uM
Temperature Range During Event: Max: 28 °C, Min: 23 °C
Salinity Range During Event: Max: 34, Min: 31
Bloom location in the water column:
Growth: Advected
In situ
Growth Comments Extending to the Southeastern and eastern coast
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: culturing finfishes such as rockfish, flounder and seabream were died by suffocation when they were exposed to the dense bloom
Economic losses: direct loss: USD 21,500,000
Management decision:
Additional harmful effect information: