Tritons are a shellfish.
The animal is like a slug and can extend from its shell for at least a shell length. Charonia tritonis is the scientific name of the Giant Triton. The diet of the triton shell has been known since the 1960s and similar species occur in every ocean of the world feeding primarily on starfish. There are many species of starfish worldwide. Of interest, it occurs only in the Indian and Pacific Oceans, with Atlantic reefs being free of this coral predator.