The Indigo Sea is a major sea between Lyrilla, Jesenya, and Ranu that contains many smaller seas. It is named for the hue of its waters.

Seas of the Indigo Sea:
Krov Mare
Azure Sea
Asderes Straits
Sea of Flowers
Adam Sea
Royal Sea
Jasper Sea

Nations of the Indigo Sea:
Frohm - aquatic from is in the Winter and Jasper Seas
Coral Green - contains Royal Sea; Kelpie
Clupea - Clupean
Sellenor - contains Adam Sea, Azure Sea, Krov Mare, Asderes Straits
Gwythion - Sea of Flowers; Sirine