The ballan-wrasse: in allusion to a supposed sucking noise like that of a pig made by the fish. See cut under(noun)
The Century Dictionary (Public Domain)
Use "sea-swine" in a sentence
"I even had the fancy that one might fish for them and find them in such a sea, turned into monsters; sea-swine or four-legged fishes, swollen and with evil eyes, grown over with sea-grass for bristles; the ghosts of Gadara."