+**Saltwater** is [water](/wiki/water) containing dissolved [salt](/wiki/salt), primarily sodium chloride. It fills the Earth's [oceans](/wiki/ocean) and seas, forming a vast and ancient habitat for countless forms of life.
+## See also
+- [Sea](/wiki/sea)
+- [Brine](/wiki/brine)
+- [Marine Life](/wiki/marine_life)
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