genus Astropogon vs fish genus

genus Astropogon and fish genus both are nouns.

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

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

genus Astropogon (noun)	fish genus (noun)
a genus of fish of the family Apogonidae	any of various genus of fish