sleeper goby vs percoidean

sleeper goby and percoidean both are nouns.

Word	Noun	Adjective	Verb	Adverb
sleeper goby	Yes	No	No	No
percoidean	Yes	No	No	No

As nouns, percoidean is a hypernym of sleeper goby; that is, percoidean is a word with a broader meaning than sleeper goby:

sleeper goby: tropical fish that resembles a goby and rests quietly on the bottom in shallow water
percoidean: any of numerous spiny-finned fishes of the order Perciformes

Other hypernyms of sleeper goby include percoid, percoid fish.

sleeper goby (noun)	percoidean (noun)
tropical fish that resembles a goby and rests quietly on the bottom in shallow water	any of numerous spiny-finned fishes of the order Perciformes