genus Lamna vs fish genus

genus Lamna and fish genus both are nouns.

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

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

genus Lamna (noun)	fish genus (noun)
a genus of Lamnidae	any of various genus of fish