wolffish vs blennioid

wolffish and blennioid both are nouns.

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

As nouns, blennioid is a hypernym of wolffish; that is, blennioid 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: elongated mostly scaleless marine fishes with large pectoral fins and reduced pelvic fins

Other hypernyms of wolffish include blennioid fish.

wolffish (noun)	blennioid (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