(rare) Alternative form of sealion (“engage in disingenuous debate”)

(geography) An inland sea bound by Southeastern Europe in the west, Eastern Europe in the north and northeast, and Turkey in the south.

Any of many polyps, of the order Actiniaria, which occurs in marine and estuarine habitats, and which captures its food using tentacles

Any of several marine mammals of the order Sirenia, including the manatee and dugong.

An inland sea in Indonesia that is part of the Pacific Ocean and is between the islands of Buru and Ceram.

A sea north of the island of Java in Indonesia and south of Borneo.

Any sessile tunicate, of the class Ascidiacea, which squirts water from two openings when touched; they are filter feeders

The Arctic Ocean.

The nominal height of the surface of the oceans above which heights of geographical features and aircraft flight levels are measured.

A large but relatively shallow expanse of water within a landmass, sometimes connected to the ocean.