genus Lepisosteus vs fish genus

genus Lepisosteus and fish genus both are nouns.

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

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

genus Lepisosteus (noun)	fish genus (noun)
type genus of the Lepisosteidae: freshwater gars	any of various genus of fish