marine animal vs marine creature

marine animal and marine creature both are nouns.

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

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

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

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

marine animal (noun)	marine creature (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