headfish

from WordNet (r) 3.0 (2006)

headfish
    n 1: 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}, {headfish}]

from The Collaborative International Dictionary of English v.0.48

Headfish \Head"fish`\ (h[e^]d"f[i^]sh`), n. (Zool.)
   The sunfish ({Mola}). Head gear