serranid vs serranid fish

serranid and serranid fish both are nouns.

Word	Noun	Adjective	Verb	Adverb
serranid	Yes	No	No	No
serranid fish	Yes	No	No	No

As nouns, serranid and serranid fish are synonyms defined as:

serranid and serranid fish: marine food sport fishes mainly of warm coastal waters

serranid (noun)	serranid fish (noun)
marine food sport fishes mainly of warm coastal waters	marine food sport fishes mainly of warm coastal waters