Source : WordNet®

moonfish
     n 1: any of several silvery marine fishes with very flat bodies
          [syn: {Atlantic moonfish}, {horsefish}, {horsehead}, {horse-head},
           {dollarfish}, {Selene setapinnis}]
     2: large elliptical brightly colored deep-sea fish of Atlantic
        and Pacific and Mediterranean [syn: {opah}, {Lampris
        regius}]
     [also: {moonfishes} (pl)]

moonfishes
     See {moonfish}