minnow vs cyprinid fish

minnow and cyprinid fish both are nouns.

Word	Noun	Adjective	Verb	Adverb
minnow	Yes	No	No	No
cyprinid fish	Yes	No	No	No

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

minnow: very small European freshwater fish common in gravelly streams
cyprinid fish: soft-finned mainly freshwater fishes typically having toothless jaws and cycloid scales

Other hypernyms of minnow include cyprinid.

minnow (noun)	cyprinid fish (noun)
very small European freshwater fish common in gravelly streams	soft-finned mainly freshwater fishes typically having toothless jaws and cycloid scales