1. any voracious marine fish of the genus Sphyraena having an elongated cylindrical body and large mouth with projecting lower jaw and long strong teeth
2. A voracious, pikelike, marine fish, of the genus Sphyræna, sometimes used as food.
3. Any of several voracious pikelike marine fishes allied to the gray mullets, constituting the genus Sphyræna and family Sphyrænidæ. The great barracuda (S. barracuda) of the West Indies, Florida, etc., is often six feet or more long, and as dangerous as a shark. In Cuba its flesh is reputed to be poisonous. S. Argentea of the Pacific coast and S. sphyræna of Europe are smaller species, and are used as food.