Clupea harangus vs clupeid fish

Clupea harangus and clupeid fish both are nouns.

Word	Noun	Adjective	Verb	Adverb
Clupea harangus	Yes	No	No	No
clupeid fish	Yes	No	No	No

As nouns, clupeid fish is a hypernym of Clupea harangus; that is, clupeid fish is a word with a broader meaning than Clupea harangus:

Clupea harangus: commercially important food fish of northern waters of both Atlantic and Pacific
clupeid fish: any of numerous soft-finned schooling food fishes of shallow waters of northern seas

Other hypernyms of Clupea harangus include food fish, clupeid.

Clupea harangus (noun)	clupeid fish (noun)
commercially important food fish of northern waters of both Atlantic and Pacific	any of numerous soft-finned schooling food fishes of shallow waters of northern seas