goldfish vs cyprinid fish

goldfish and cyprinid fish both are nouns.

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

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

goldfish: small golden or orange-red freshwater fishes of Eurasia used as pond or aquarium fishes
cyprinid fish: soft-finned mainly freshwater fishes typically having toothless jaws and cycloid scales

Other hypernyms of goldfish include cyprinid.

goldfish (noun)	cyprinid fish (noun)
small golden or orange-red freshwater fishes of Eurasia used as pond or aquarium fishes	soft-finned mainly freshwater fishes typically having toothless jaws and cycloid scales