A plant species that only grows in certain regions and islands of the ocean. Though it looks like a fungus of some sort, it actually comes from a substance secreted by certain soft-bodied organisms.
In the folktales told in a certain land, these mouthless, noseless creatures are the transformed souls of children who died young. As a form of punishment, they must spend endless years absorbing the elements within the sand and sea using their fragile bodies, piling them up and forming "Sea Ganoderma." And once the Ganoderma are fully formed, they shall be harvested.