marine
ma-rine
noun
A soldier specially trained for service on land or at sea.
"A Royal Marine demonstrated their combat skills."
adjective
Pertaining to the sea, its creatures, or activities connected with it.
"They studied the diverse marine life of the ocean."
Thesaurus
Synonyms: aquatic, nautical, maritime, devil dog, leatherneck, shipboard soldier, subocean, oversea, oceangoing, seafaring, offshore, deep-sea