Seriphus vs fish genus

Seriphus and fish genus both are nouns.

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

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

Seriphus (noun)	fish genus (noun)
a genus of Sciaenidae, containing the queenfish (Seriphus)	any of various genus of fish