Pelagia is an Underwater Kingdom of Merfolk, Little-Mermaid-esque and otherwise, spanning two Ages. It may refer to:

• EA Pelagia, Pearl Kings → This one is a sacral kingdom, with multiple tribes bound under powerful priest-kings.
• MA Pelagia, Triton Kings → This one is bronze-clad and more-civilized, with small colonies of the amphibious.

Both have high-and-plentiful Water magic, shenanigans with Astral Pearls, and a somewhat-rough time claiming dry land.