What is "headfish"

Headfish \Head"fish`\ (h[e^]d"f[i^]sh`), n. (Zo["o]l.) The sunfish ( Mola).

n. The sunfish (of family Molidae).

n. among the largest bony fish; pelagic fish having an oval compressed body with high dorsal and anal fins and caudal fin reduced to a rudder-like lobe; worldwide in warm waters [syn: ocean sunfish, sunfish, mola]