wolf fish vs wolffish

wolf fish and wolffish both are nouns.

Word	Noun	Adjective	Verb	Adverb
wolf fish	Yes	No	No	No
wolffish	Yes	No	No	No

As nouns, wolf fish and wolffish are synonyms defined as:

wolf fish and wolffish: large ferocious northern deep-sea food fishes with strong teeth and no pelvic fins

Other synonyms of wolf fish include catfish.

wolf fish (noun)	wolffish (noun)
large ferocious northern deep-sea food fishes with strong teeth and no pelvic fins	large ferocious northern deep-sea food fishes with strong teeth and no pelvic fins
	large elongate scaleless oceanic fishes with sharp teeth and a long dorsal fin that resembles a sail