devilfish n 1: medium-sized grayish-black whale of the northern Pacific [syn: {gray whale}, {Eschrichtius gibbosus}, {Eschrichtius robustus}] 2: bottom-living cephalopod having a soft oval body with eight long tentacles [syn: {octopus}] 3: extremely large pelagic tropical ray that feeds on plankton and small fishes; usually harmless but its size make it dangerous if harpooned [syn: {manta}, {manta ray}] [also: {devilfishes} (pl)] devilfishes See {devilfish}