wolffish vs blennioid fish

wolffish and blennioid fish both are nouns.

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

As nouns, blennioid fish is a hypernym of wolffish; that is, blennioid fish is a word with a broader meaning than wolffish:

wolffish: large ferocious northern deep-sea food fishes with strong teeth and no pelvic fins
blennioid fish: elongated mostly scaleless marine fishes with large pectoral fins and reduced pelvic fins

Other hypernyms of wolffish include blennioid.

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