Polycyclic ethers produced by Gambierdiscus (DINOFLAGELLATES) from gambiertoxins, which are ingested by fish which in turn may be ingested by humans who are susceptible to the CIGUATERA POISONING.

Poisoning caused by ingestion of SEAFOOD containing microgram levels of CIGUATOXINS. The poisoning is characterized by gastrointestinal, neurological and cardiovascular disturbances.

A genus of hard-shelled clams in the family Veneridae, class BIVALVIA, commonly called quahogs. They are found just below the surface in the subtidal or lower intertidal coastal waters.