Clupea harangus vs food fish

Clupea harangus and food fish both are nouns.

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

As nouns, food fish is a hypernym of Clupea harangus; that is, food 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
food fish: any fish used for food by human beings

Other hypernyms of Clupea harangus include clupeid, clupeid fish.

Clupea harangus (noun)	food fish (noun)
commercially important food fish of northern waters of both Atlantic and Pacific	any fish used for food by human beings