genus Chaetodon vs fish genus

genus Chaetodon and fish genus both are nouns.

Word	Noun	Adjective	Verb	Adverb
genus Chaetodon	Yes	No	No	No
fish genus	Yes	No	No	No

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

genus Chaetodon (noun)	fish genus (noun)
type genus of the Chaetodontidae	any of various genus of fish