Sea

Sunset at sea

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 Dead Sea. The Sea of Galilee is a small freshwater lake with a natural outlet, but the term was applied to it anyway. The term is used colloquially 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.

List of seas, divided by ocean

Pacific Ocean

Atlantic Ocean

Central coast of Chile

Hudson Bay
- James Bay
Baffin Bay
Gulf of St. Lawrence
Caribbean Sea
Gulf of Mexico
Sargasso Sea
North Sea
Baltic Sea
- Gulf of Bothnia
Irish Sea
Mediterranean Sea
- Adriatic Sea
- Aegean Sea
- Black Sea
  - Sea of Azov
- Ionian Sea
- Ligurian Sea
- Mirtoon Sea
- Tyrrhenian Sea
- Gulf of Sidra
- Sea of Marmara
- Sea of Crete
Bay of Biscay
Gulf of Guinea

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 moons, 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.

Science

The term "sea" has also been used in quantum physics. Dirac sea is an interpretation of the negative energy states that comprises the vacuum.

Sea