genus Squalus vs fish genus

genus Squalus and fish genus both are nouns.

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

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

genus Squalus (noun)	fish genus (noun)
spiny dogfishes	any of various genus of fish