Portuguese man o' war
The Atlantic Portuguese man o' war lives at the surface of the ocean. The gas-filled bladder, or pneumatophore, remains at the surface, while the remainder is submerged. As the Portuguese man o' war has no means of propulsion, they move according to the winds, currents, and tides. Although they are most commonly found in the open ocean in tropical and subtropical regions, they have been found as far north as the Bay of Fundy, Cape Breton and the Hebrides.
Man O' War (game)
High Elf ships were fast maneuverable sail powered Catamarans. By comparison Dark Elves mainly used great sea creatures as the basis for their "ships" - their largest ship, the "Black Ark" could house several monster-ships within for protection.