Or rather, a reincarnation of him. Just listen to the voice. This would make Jared a reincarnation of the fish. Note their similar purposes. Jared is there to try and keep the Warden from going overboard but always fails. The Twins would be Thing One and Thing Two and maybe Alice and Jailbot are Sally and her brother seeing as they are both guards and it was the kids who ultimately capture Things 1 and 2.