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The Collaborative International Dictionary
Balistes vetula

oldwife \oldwife\ n.

  1. (Zo["o]l.) The local name of various fishes, as the European black sea bream ( Cantharus lineatus), the American alewife, etc.

  2. (Zo["o]l.) A tropical Atlantic fish ( Bessy cerca).

    Syn: queen triggerfish, Bessy cerca, oldwench, Balistes vetula.

  3. (Zo["o]l.) A common long-tailed sea duck ( Clangula hyemalis) of the northern parts of the US; also called old squaw. [WordNet sense 2]

    Syn: old squaw, Clangula hyemalis.

Wikipedia
Balistes vetula

Balistes vetula, the queen triggerfish or old wife, is a reef dwelling triggerfish found in the Atlantic Ocean. It is occasionally caught as a gamefish, and sometimes kept in marine aquaria.