Eutrophication of coastal waters has only recently
become apparent as a problem in Thailand. In the Gulf
of Thailand, the species found to bloom most frequently
are the blue-green algae Trichodesmium erythraem,
and Noctilluca sp. The relationship between these
blooms and the nutrient enrichment of coastal waters
(due mainly to the disposal of untreated sewage) is
probably inescapable, but firm evidence is elusive. A
widespread bloom in the Eastern coast of Thailand was
recorded in 1983, and caused losses to local fish farming