Source : Webster's Revised Unabridged Dictionary (1913)

Devilfish \Dev"il*fish`\, n. (Zo["o]l.)
   (a) A huge ray ({Manta birostris} or {Cephaloptera vampyrus})
       of the Gulf of Mexico and Southern Atlantic coasts.
       Several other related species take the same name. See
       {Cephaloptera}.
   (b) A large cephalopod, especially the very large species of
       {Octopus} and {Architeuthis}. See {Octopus}.
   (c) The gray whale of the Pacific coast. See {Gray whale}.
   (d) The goosefish or angler ({Lophius}), and other allied
       fishes. See {Angler}.

Cephaloptera \Ceph`a*lop"te*ra\, n. [NL., fr. Gr. ? head + ?
   wing.] (Zo["o]l.)
   One of the generic names of the gigantic ray ({Manta
   birostris}), known as {devilfish} and {sea devil}. It is
   common on the coasts of South Carolina, Florida, and farther
   south. Some of them grow to enormous size, becoming twenty
   feet of more across the body, and weighing more than a ton.

Source : WordNet®

Manta birostris
     n : largest manta (to 22 feet across wings); found worldwide but
         common in Gulf of Mexico and along southern coasts of
         United States; primarily oceanic [syn: {Atlantic manta}]