ladyfish

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Any of several marine game fishes of the family Elopidae, especially Elops saurus of warm coastal waters of the western Atlantic Ocean, having an elongated silvery body.
• noun A bonefish.

from The Century Dictionary.

• noun A fish, Albula vulpes, of the family Albulidæ, of a brilliant silvery color, abundant in tropical seas, and quite gamy, but of little value as food.
• noun A labroid fish, Harpe rufa, with 12 dorsal spines, continuous lateral line, scaly cheeks and opercles, base of dorsal fin scaly, and posterior canines. It is a common West Indian fish, occurring also along the Florida coast, and of beautiful color. More fully called Spanish ladyfish; also doncella.
• noun The skipper or saury, Scomberesox saurus.
• noun A trachinoid fish, Sillago domina, found in the Bay of Bengal and generally throughout the East Indian archipelago.
• noun The ten-pounder.
• noun A mermaid.

from the GNU version of the Collaborative International Dictionary of English.

• noun A large, handsome oceanic fish (Albula vulpes), found both in the Atlantic and Pacific oceans; -- called also bonefish, grubber, French mullet, and macabé.
• noun A labroid fish (Harpe rufa) of Florida and the West Indies.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A coastal dwelling fish in the genus Elops, found throughout the tropical and sub-tropical regions.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun game fish resembling the tarpon but smaller