genus Cosmocampus vs fish genus

genus Cosmocampus and fish genus both are nouns.

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

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

genus Cosmocampus (noun)	fish genus (noun)
a genus of fish in the family Syngnathidae	any of various genus of fish