Someone who studies marine biology.

plural of marine biologist

An infantry corps which is trained or assigned to fight on or after transport by navy ships.

(nautical) A seaman who has qualified to be a captain of a merchant ship

cane toad

Any venomous box jellyfish.

plural of marine infantry

An engine for marine use, installed in a boat or ship. For small vessels, these are usually adapted automotive engines; for large vessels they are specially built for the purpose.

plural of marine engine

(marine biology) Sinking organic detritus in the ocean.