General Information

Event name: SV-12-002
Nature of the harmful event:
Water Discoloration , High Phyto concentration , Mass mortalities , Foam/Mucilage in the coast
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: Yes (National Monitoring Programme of the Marine Environment)
Event occurred before in this location: No
Individuals to contact: ALVARADO-CALLEJAS, Yaneth , AMAYA-MONTERROSA, Oscar , QUINTANILLA, Rebeca

Location & Date

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Location: Latitude: 13.166667, Longitude: -87.900000
General location information: From La Perla to Puerto de La Libertad, La Libertad
HAB Area code(s): ELS-05
Additional location information: The bloom covered 3 km wide and 13 km long. By April, the bloom reached Los Cóbanos (west coast of El Salvador) and extended to the coast of Guatemala.
Bloom event dates (yyyy/mm/dd): Event Date:2012-03-23
Start: 2012-03-23, End: 2012-05-17
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Cochlodinium polykrikoides (215000000 cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography: Espinoza, J., Amaya, O., Reguera, B., Alvarado, Y., Ruiz, G. and D. Escobar. 2013. A Cochlodinium polykrikoides Bloom in El Salvador. Harmful Algae News, IOC Newsletter on toxic algae and algal blooms, 47:13. Espinoza, Jaime, Oscar Amaya, and Rebeca Quintanilla. 2013. Atlas de Fitoplancton Marino. 1st Ed. San Salvador: Universidad de El Salvador. 52p.

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: Oxygen content (nL/L): Wind velocity:
Temperature (°C): 26.8 to 28.7 Oxygen saturation %: Current Direction:
Sechhi disk (m): 0.6 to 3.5 Salinity: 34.7 to 35.1 Current Velocity:
Nutrient information:
Temperature Range During Event: Max: 28.7 °C, Min: 26.8 °C
Salinity Range During Event: Max: 34.7, Min: 35.1
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: This event coincided with Easter, when many tourists visited the area, and caused great social alarm. The bloom caused mortality of benthic fish populations, a putrid smell from decaying organic matter, and severe headache to visitors and local residents.
Created at 06:55 on 6 Jun 2018