General Information

Event name: KR-01-001
Nature of the harmful event:
Water Discoloration , High Phyto concentration , Mass mortalities
Event directly affected:
Natural Fish , Aquaculture Fish
Toxicity detected: No
Associated syndrome:
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

[View larger map]
Location: Latitude: 34.583056, Longitude:
General location information: Yeosu, Jeonnam province
HAB Area code(s): KR-04
Additional location information: patch with 10-200km length and 500m width
Bloom event dates (yyyy/mm/dd): Start: 2001-08-14, End: 2001-09-24
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Cochlodinium polykrikoides (29,000,000 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 NFRDIU and webpage(

Environmental Conditions

Weather: fine Turbidity (NTU): Wind direction: NE
Stratified water: No Oxygen content (nL/L): 6.7-7.6 Wind velocity:
Temperature (°C): 22.6-28.0 Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: 33 Current Velocity: 1
Nutrient information: PHOSPHATE: 0.6-1.2uM
DIN: 5-45uM
Temperature Range During Event: Max: 22 °C, Min: 28 °C
Salinity Range During Event: Max: 34, Min: 29
Bloom location in the water column:
Growth: Advected
In situ
Growth Comments Extending to the Southern 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:
Economic losses: culturing finfishes such as rockfish, flounder and seabream were died by suffocation when they were exposed to the dense bloom
Management decision:
Additional harmful effect information: direct loss: USD 8,400,000