Of or belonging to the ocean depths, especially below 2000 metres (6500 ft): abyssal zone.
Pertaining to or occurring at excessive depths in the earth's crust; plutonic.
Bordering on the sea; living near the seacoast; coastal.
Inhabiting the seashore; living coastwise; littoral. (distinguished from marine)
Relating to or connected with the sea or its uses (as navigation, commerce, etc.).
Of or relating to a sailor or seaman; nautical.