Sea Snail

The Sea Snail is a rare creature that spawns in the Ocean on either end of the world, usually during the daytime and in a group. It slowly crawls along the sea floor. When killed it drops Purple Mucos, which is used to create Purple Dye at a Dye Vat. They are immune to the Confused debuff.

Trivia

 * It appears to be a reference to ancient Greece, where sea snails were harvested to make purple dye.