The Merid Sea lies between Perluxia and Prim'terra and contain many important trade routes, island chains, and orphan islands which are collectively called the Myriad Islands.
Beneath the surface lies the three territories of the Tricoral Alliance which consist of merfolk, triton, and sea elf.
On the surface though, the most notable location that combines not only those Merid people, but islanders and continentals as well is the city of The Drift.