Word: ptychodiscus
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When such blights occur in coastal areas, the result can be devastating. Last November a red tide off the coast of the Carolinas killed several thousand mullet and all but wiped out the scallop population. Reason: the responsible species, Ptychodiscus brevis, contains a poison that causes fish to bleed to death. Brown tides, unknown to Long Island waters before 1985, have occurred every summer since; they pose a constant threat to valuable shellfish beds...
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