Sea may refer to:
- Lunar Sea, the sea North-west of the Fremennik Province
- Northern Sea, extends from Kandarin to past Morytania
- Southern Sea, a sea between Asgarnia and Kandarin, and below Misthalin
- Western Sea, the great ocean due west of Tirannwn, bordering the known world of Gielinor
- Eastern Sea, the unofficial name given to the large body of water found east of the known mainland of Gielinor
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