'Moonfish' definitions:

Definition of 'moonfish'

noun

Any of several silvery marine fishes with very flat bodies [syn: moonfish, Atlantic moonfish, horsefish, horsehead, horse-head, dollarfish, Selene setapinnis]

noun

Large elliptical brightly colored deep-sea fish of Atlantic and Pacific and Mediterranean [syn: opah, moonfish, Lampris regius]

From: GCIDE

Moonfish \Moon"fish`\, n. (Zool.) (a) An American marine fish (Vomer setipennis); -- called also bluntnosed shiner, horsefish, and sunfish. (b) A broad, thin, silvery marine fish (Selene vomer); -- called also lookdown, and silver moonfish. (c) The mola. See Sunfish, 1. [1913 Webster]

From: GCIDE

Spadefish \Spade"fish`\ (sp[=a]d"f[i^]sh`), n. (Zool.) An American market fish (Chaetodipterus faber) common on the southern coasts; -- called also angel fish, moonfish, and porgy. [1913 Webster]