cardinalfish vs percoid fish

cardinalfish and percoid fish both are nouns.

Word	Noun	Adjective	Verb	Adverb
cardinalfish	Yes	No	No	No
percoid fish	Yes	No	No	No

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

Other hypernyms of cardinalfish include percoid, percoidean.

cardinalfish (noun)	percoid fish (noun)
small red fishes of coral reefs and inshore tropical waters	any of numerous spiny-finned fishes of the order Perciformes