Sea Snail

The Sea Snail is a rare creature that spawns in the Ocean on either end of the world, usually during the daytime. 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

 * The Murex sea snail was used to create purple dye in the real world.
 * A possible reference to Bioshock were white sea snails and sea slugs produce ADAM, which is a reddish/purplish color.