It has some similarities, but it doesn't quite fit the feel I'm going for. In my homebrew setting the goddess of the seas is also called "The Mother of All Monsters," because she created the monstrous races and the beasts of the sea (which can get pretty darn freaky looking even in a non-fantasy environment). Therefore I'm trying to balance a more generic water domain with aspects of monstrosity. Hence, Evard's Black Tentacles being on the domain spell list.
But thanks for the link anyways. I appreciate the attempt.