Board Thread:General Discussion/@comment-26340222-20160312083026/@comment-6175354-20160313223118

Eskaver wrote:

Poseidon only rules the seas and he has competition with Ursula, Merlin, and the DOs and what not. The Seas on OUaT seem to be their own dimension, and the connection between all the realms. Which explains why mermaids, are able to create portals underwater.