lobefin vs bony fish

lobefin and bony fish both are nouns.

Word	Noun	Adjective	Verb	Adverb
lobefin	Yes	No	No	No
bony fish	Yes	No	No	No

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

lobefin: any fish of the order Crossopterygii; most known only in fossil form
bony fish: any fish of the class Osteichthyes

lobefin (noun)	bony fish (noun)
any fish of the order Crossopterygii; most known only in fossil form	any fish of the class Osteichthyes