The Sea Snail is a rare enemy that spawns in the Ocean on either end of the world, usually during the daytime. Even then the spawn rate is still the lowest of all enemies in the Ocean, one third that of Squids. It slowly crawls along the sea floor. When killed, it drops Purple Mucos, which is used to craft Purple Dye at a Dye Vat. Sea Snails are immune to the Confused debuff.
- Although this enemy is very rare, it cannot be detected by the Lifeform Analyzer.
- It closely resembles the Syrinx aruanus (commonly known as Australian trumpet or false trumpet), the largest extant snail (shelled gastropod) species in the world, and the largest (heaviest) gastropod in the world.
- The Murex sea snail was used to create purple dye in the real world.