Clupea harangus vs clupeid

Clupea harangus and clupeid both are nouns.

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

As nouns, clupeid is a hypernym of Clupea harangus; that is, clupeid 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: any of numerous soft-finned schooling food fishes of shallow waters of northern seas

Other hypernyms of Clupea harangus include food fish, clupeid fish.

Clupea harangus (noun)	clupeid (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