Meaning of jackknife-fish

jack•knife-fish

Pronunciation: ( jak'nīf"fish"), [key]
— pl. -fish•es, -fish.
  1. a black and white, American drum, Equetus lanceolatus, found in tropical areas of the Atlantic Ocean, having an elongated dorsal fin that is held erect.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
See also: