pilotfish vs Naucrates ductor

pilotfish and Naucrates ductor both are nouns.

Word	Noun	Adjective	Verb	Adverb
pilotfish	Yes	No	No	No
Naucrates ductor	Yes	No	No	No

As nouns, pilotfish and Naucrates ductor are synonyms defined as:

pilotfish and Naucrates ductor: small pelagic fish often accompanying sharks or mantas

pilotfish (noun)	Naucrates ductor (noun)
small pelagic fish often accompanying sharks or mantas	small pelagic fish often accompanying sharks or mantas