marine creature vs marine animal

marine creature and marine animal both are nouns.

Word	Noun	Adjective	Verb	Adverb
marine creature	Yes	No	No	No
marine animal	Yes	No	No	No

As nouns, marine creature and marine animal are synonyms defined as:

marine creature and marine animal: any of numerous animals inhabiting the sea including e.g. fishes and molluscs and many mammals

Other synonyms of marine creature include sea animal, sea creature.

marine creature (noun)	marine animal (noun)
any of numerous animals inhabiting the sea including e.g. fishes and molluscs and many mammals	any of numerous animals inhabiting the sea including e.g. fishes and molluscs and many mammals