General Information

Event name: KR-00-001
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: No
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: LEE, C.K.

Location & Date

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Location: Latitude: 34.583056, Longitude: 127.833056
General location information: Yeosu, Cholla Province
HAB Area code(s): KR-04
Additional location information:
Bloom event dates (yyyy/mm/dd): Event Date:2000-08-24
Start: 2000-08-22, End: 2000-09-20
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Cochlodinium polykrikoides (15,000,000 cells/L)
Monospecific bloom
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography: Details in daily HABs newsletter issued by NFRDI and webgape (

Environmental Conditions

Weather: Fine Turbidity (NTU): 3-5 Wind direction:
Stratified water: Oxygen content (nL/L): 5 Wind velocity:
Temperature (°C): 22.6-28.8 Oxygen saturation %: 85 Current Direction:
Sechhi disk (m): Salinity: 33 Current Velocity: 1
Nutrient information: PHOSPHATE: 0.1-0.3 ÁM/L
DIN: 5-20 ÁM/L
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 coast
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: 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 260000
Management decision:
Additional harmful effect information: