v497Neptune's Shell
Item 497   Merfolk example
Right: Effect of Neptune's Shell
Type Accessory
Body Slot Accessory Slot
Quality Tier 5
Tooltip Transforms the holder
into merfolk when
entering water
Dropped By Creature from the Deep Icon pc
Sell Value 3 GoldCoin Small
Icon xbox360 Xbox 360 Icon ps3 PS3 Icon mobile Mobile 
Crafted With 20 Souls of Fright
15 Coral
15 Goldfish
5 Shark Fins
5 Souls of Light
5 Souls of Night
Crafted At Mythril Anvil
Orichalcum Anvil
Material In Moon Shell

The Neptune's Shell is an equippable item that transforms the wearer into Merfolk when they enter water. In this state the player has the ability to breathe underwater, swim as if they had flippers, and isn't slowed down like normal. The effect instantly wears off as they leave the body of water.

Terraria - Turn Into A FISH Neptunes Shell Terraria HERO Terraria Wiki03:35

Terraria - Turn Into A FISH Neptunes Shell Terraria HERO Terraria Wiki


  • The Neptune's Shell does not work in lava, even when used in conjunction with an Obsidian Skin Potion. This is probably because one cannot drown in lava.
  • If both a Neptune's Shell and Moon Charm or Moon Shell are/is equipped while the player is underwater at night, the merfolk transformation overrides the werewolf transformation.
  • Oddly enough, you still transform when submerged in honey, though there is the regular slow down. This is probably because you can drown in honey.
  • Wearing a Fish Bowl will not transform the player.
  • The player's head moves up and down while swimming.


  • If the player goes directly from lava to water, they will not transform until they leave and re-enter the water.

Update Info


  • Now you can hide the transformation while keeping the bonuses, or put it in the vanity slots.




  • Added to the game.

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