A sea (pronounced see) is a large expanse of saline water connected with an ocean. The term is also used for large, usually saline, lakes that lack a natural outlet, such as the Caspian Sea and the Sea of Galilee. The term is used in a less geographically precise manner as synonymous with ocean, as in the tropical sea or down to the sea shore, or even sea water referring to water of the ocean.

Many seas are marginal seas.

Table of contents
1 List of seas, divided by ocean
2 Extraterrestrial seas

List of seas, divided by ocean

Pacific Ocean

Atlantic Ocean

Indian Ocean

Arctic Ocean

Southern Ocean

Landlocked seas

Extraterrestrial seas

Lunar maria are vast basaltic plains on the Moon that were thought to be bodies of water by early astronomers, who referred to them as "seas."

Liquid water is thought to be present under the surface of several moonss, most notably Europa.

Liquid hydrocarbons are thought to be present on the surface of Titan, though it may be more accurate to describe them as "lakes" rather than "seas". The distribution of these liquid regions will hopefully be better known after the arrival of the Cassini probe.

See also: ocean, river, geography, firths of Scotland, inlet, sea salt, ship