menhaden vs clupeid fish

menhaden and clupeid fish both are nouns.

Word	Noun	Adjective	Verb	Adverb
menhaden	Yes	No	No	No
clupeid fish	Yes	No	No	No

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

menhaden: shad-like North American marine fishes used for fish meal and oil and fertilizer
clupeid fish: any of numerous soft-finned schooling food fishes of shallow waters of northern seas

Other hypernyms of menhaden include clupeid.

menhaden (noun)	clupeid fish (noun)
shad-like North American marine fishes used for fish meal and oil and fertilizer	any of numerous soft-finned schooling food fishes of shallow waters of northern seas