genus Carcharodon vs fish genus

genus Carcharodon and fish genus both are nouns.

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

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

genus Carcharodon (noun)	fish genus (noun)
man-eating sharks	any of various genus of fish