The waters surrounding the Isle of Man support a rich marine ecosystem. The basking sharks that visit in summer, the seal colonies, the seabird populations on the Calf of Man, and the marine life of the Irish Sea are all part of the Island's natural heritage. The sea was not just a barrier or a highway but a living environment that Manx people depended on for food, for transport, and for their understanding of the world they lived in. Manannan's kingdom was not empty.