red tide

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red tide

n.
A bloom of plankton, especially dinoflagellates, that causes a usually reddish discoloration of coastal ocean waters. Certain dinoflagellates produce toxins that contaminate shellfish, making them unsafe to eat, and can kill fish.

red tide

n
(Environmental Science) a discoloration of sea water caused by an explosive growth in phytoplankton density: sometimes toxic to fish life and, through accumulation in shellfish, to humans

red′ tide′


n.
a brownish red discoloration of marine waters caused by a huge aggregation of flagellates, esp. dinoflagellates, that often produce a potent neurotoxin that contaminates shellfish.
[1900–05]

red tide

A population explosion of certain species of dinoflagellates, a kind of protozoan found in plankton. The dinoflagellates color the water red or reddish-brown, and secrete a toxin that kills fish. Red tide usually occurs in warm coastal waters.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.red tide - seawater that is discolored by large numbers of certain dinoflagellates that produce saxitoxin
brine, saltwater, seawater - water containing salts; "the water in the ocean is all saltwater"