Giants Clams have crystalized ambient magic around themselves into pearls, and as they grow larger, so too do their pearls and live in the sunken sea. They gain the ability to use both Psychic magic and water magic stored in their pearls to some degree. the pearls contain. Giants Clams are mermaids who have shell like Clams. The Clams don't like direct contract so they will hide in shells whenever someone gets near them.