rattail vs rattail fish

rattail and rattail fish both are nouns.

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

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

rattail and rattail fish: deep-sea fish with a large head and body and long tapering tail

Other synonyms of rattail include grenadier.

rattail (noun)	rattail fish (noun)
deep-sea fish with a large head and body and long tapering tail	deep-sea fish with a large head and body and long tapering tail