rudd vs cyprinid fish

rudd and cyprinid fish both are nouns.

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

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

rudd: European freshwater fish resembling the roach
cyprinid fish: soft-finned mainly freshwater fishes typically having toothless jaws and cycloid scales

Other hypernyms of rudd include cyprinid.

rudd (noun)	cyprinid fish (noun)
European freshwater fish resembling the roach	soft-finned mainly freshwater fishes typically having toothless jaws and cycloid scales