clingfish vs percoid

clingfish and percoid both are nouns.

Word	Noun	Adjective	Verb	Adverb
clingfish	Yes	No	No	No
percoid	Yes	No	No	No

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

clingfish: very small (to 3 inches) flattened marine fish with a sucking disc on the abdomen for clinging to rocks etc.
percoid: any of numerous spiny-finned fishes of the order Perciformes

Other hypernyms of clingfish include percoid fish, percoidean.

clingfish (noun)	percoid (noun)
very small (to 3 inches) flattened marine fish with a sucking disc on the abdomen for clinging to rocks etc.	any of numerous spiny-finned fishes of the order Perciformes