DEVILFISH
manta, manta ray, devilfish
(noun) extremely large pelagic tropical ray that feeds on plankton and small fishes; usually harmless but its size make it dangerous if harpooned
octopus, devilfish
(noun) bottom-living cephalopod having a soft oval body with eight long tentacles
Source: WordNet® 3.1
Etymology
Noun
devilfish (plural devilfishes or devilfish)
Any of several unrelated marine animals
manta ray
octopus
gray whale
the goosefish or angler (Lophius), and other allied fishes
Source: Wiktionary
Dev"il*fish`, n. (Zoöl.)
(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.
Source: Webster’s Unabridged Dictionary 1913 Edition