bony fish vs fish

bony fish and fish both are nouns.

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

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

bony fish: any fish of the class Osteichthyes
fish: any of various mostly cold-blooded aquatic vertebrates usually having scales and breathing through gills

bony fish (noun)	fish (noun)
any fish of the class Osteichthyes	any of various mostly cold-blooded aquatic vertebrates usually having scales and breathing through gills
	the flesh of fish used as food

bony fish (verb)	fish (verb)
	catch or try to catch fish or shellfish
	seek indirectly