porcupinefish vs Diodon hystrix

porcupinefish and Diodon hystrix both are nouns.

Word	Noun	Adjective	Verb	Adverb
porcupinefish	Yes	No	No	No
Diodon hystrix	Yes	No	No	No

As nouns, porcupinefish and Diodon hystrix are synonyms defined as:

porcupinefish and Diodon hystrix: spines become erect when the body is inflated; worldwide in warm waters

Other synonyms of porcupinefish include porcupine fish.

porcupinefish (noun)	Diodon hystrix (noun)
spines become erect when the body is inflated; worldwide in warm waters	spines become erect when the body is inflated; worldwide in warm waters