Terraria Wiki
Terraria Wiki

The Neptune's Shell is an accessory that transforms the wearer into Merfolk when they enter water. It must be equipped in accessory slot for it to take effect. In this state the player has the ability to breathe underwater, swim as if they had Flippers, and isn't slowed down like normal. It is only craftable in 3DS/Old Gen Console.


  • 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 will remove the bonuses provided by the werewolf buff.
  • You do not move faster in honey. All aquatic accessories share this aspect. The only accessory that accelerates movement in honey would be Fishron Wings.
  • Wearing a Fish Bowl will not transform the player. However, the player can't drown either.
  • While underwater, Wings will not show and hovering with wings like the Hoverboard cannot be used. All other accessories will be visible while transformed.
  • The head, body, and legs are affected by dyes put on their respective armor parts. Putting dye on the shell has no effect.
  • If the player equips it as a vanity accessory, they will look like a merfolk all the time.
  • Merfolk Buff tooltip: Can breathe and move easily underwater.
  • Drop rate: 2%.


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

Update Info


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




  • Added to the game.
Offensive Avenger Emblem · Destroyer Emblem · Eye of The Golem · Feral Claws · Fire Gauntlet · Hercules Beetle · Magma Stone · Mechanical Glove · Necromantic Scroll · Papyrus Scarab · Power Glove Pygmy Necklace · Ranger Emblem · Sniper Scope · Sorcerer Emblem · Titan Glove · Warrior Emblem
Defensive Bee Cloak · Black Belt · Cross Necklace · Frozen Turtle Shell · Honey Comb · Paladin's Shield · Panic Necklace · Shackle · Star Cloak · Star Veil · Sweetheart Necklace
Immunity Adhesive Bandage · Ankh Charm · Ankh Shield · Armor Bracing · Armor Polish · Bezoar · Blindfold · Cobalt Shield · Fast Clock · Countercurse Mantra · Hand Warmer · Lava Charm · Lava Waders · Medicated Bandage · Megaphone · Nazar · Obsidian Horseshoe · Obsidian Shield · Obsidian Skull · Obsidian Water Walking Boots · The Plan · Trifold Map · Vitamins
Speed Aglet · Anklet of the Wind · Flurry Boots · Frostspark Boots · Hermes Boots · Ice Skates · Lightning Boots · Spectre Boots · Tabi
Jumping Blizzard in a Balloon · Blizzard in a Bottle · Blue Horseshoe Balloon · Bundle of Balloons · Cloud in a Balloon · Cloud in a Bottle · Fart in a Balloon · Fart in a Jar · Honey Balloon · Sandstorm in a Balloon · Sandstorm in a Bottle · Shiny Red Balloon · White Horseshoe Balloon · Yellow Horseshoe Balloon
Flying Angel Wings · Bat Wings · Bee Wings · Bone Wings · Butterfly Wings · Demon Wings · Fairy Wings · Festive Wings · Flame Wings · Flying Carpet · Frozen Wings · Ghost Wings · Harpy Wings · Hoverboard · Jetpack · Leaf Wings · Rocket Boots · Sparkly Wings (console) · Spooky Wings · Tattered Fairy Wings
Water Arctic Diving Gear · Breathing Reed · Diving Gear · Flipper · Jellyfish Diving Gear · Jellyfish Necklace · Neptune's Shell · Water Walking Boots
Fall damage Lucky Horseshoe · Umbrella
Informational Compass · Copper Watch · Depth Meter · Gold Watch · GPS · Platinum Watch · Ruler · Silver Watch · Tin Watch · Tungsten Watch
Health & Mana Band of Regeneration · Band of Starpower · Charm of Myths · Magic Cuffs · Mana Flower · Mana Regeneration Band · Nature's Gift · Philosopher's Stone
Vanity Angel Halo · Diamond Ring · Red Cape · Winter Cape
Miscellaneous Binoculars · Brick Layer · Celestial Stone · Climbing Claws · Clothier Voodoo Doll · Discount Card · Gravity Globe · Guide Voodoo Doll · Lucky Coin · Master Ninja Gear · Moon Charm · Moon Shell · Moon Stone · Obsidian Rose · Paint Sprayer · Rifle Scope · Shoe Spikes · Sun Stone · Tiger Climbing Gear · Tiki Totem · Toolbelt · Toolbox
Unobtainable Cenx's Wings · Crowno's Wings · D-Town's Wings · Red's Wings · Steampunk Wings · Will's Wings