Neptune's Shell

Neptune's Shell is a Hardmode accessory that aids underwater (any liquid) performance by granting indefinite breathing time underwater, and swimming via the key, as well as eliminating the slow movement speed usually caused by water. Entering water with this accessory equipped transforms the player into Merfolk, a buff with no time limit. While in this form, the breath meter will not display (nor will it decrease), therefore effectively preventing drowning.

On the, it has a 2% / (1/50 / ) chance to drop from Creature from the Deep during a Solar Eclipse event. On the s and s, it is only obtained through crafting.

Neptune's Shell can be considered an upgrade from the Diving Gear in most respects, but lacks the underwater lighting of the Jellyfish Diving Gear and the extra mobility on ice of the Arctic Diving Gear.

Trivia

 * The name of the item refers to the Roman god, Neptune, god of the sea.

History
Coquillage de Neptune