Tetrapturus vs fish genus

Tetrapturus and fish genus both are nouns.

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

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

Tetrapturus (noun)	fish genus (noun)
a genus of Istiophoridae	any of various genus of fish