Definition of jackknife fish in English:

jackknife fish


  • A strikingly marked fish with a long, upright dorsal fin that lives among rocks and corals in the warm waters of the western Atlantic.

    • ‘The Jackknife fish will comb the sandy bottom looking for worms, crustaceans, and small fish if it is hungry. It may even eat the occasional fireworm.’
    • ‘The jackknife fish is a particularly handsome species, which immediately catches the eye with its long tapering first dorsal fin.’