marine creature vs sea creature

marine creature and sea creature both are nouns.

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

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

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

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

marine creature (noun)	sea 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