Giant Shelly

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Giant Shelly
Giant Shelly.gif Giant Shelly Orange.gif
Classic mode icon.png Classic
Expert mode icon.png Expert
Master mode icon.png Master
AI TypeTortoise AI
Damage16/3256/4884 / 244364 (while spinning)
Max Life50/100220/150330
Defense12/1224 / 24 (while spinning)
KB Resist25%/33%/40%
BannerGiant Shelly BannerGiant Shelly Banner(Desktop, Console and Mobile versions)
Immune toConfused
Coins1 SC20 CCPre-Hardmode: 3 SCHardmode: 4 SC80 CC
  • Item (Quantity)Rate
  • Potato ChipsPotato Chips(Desktop, Console and Mobile versions)
  • 1.25%
  • CompassCompass(Desktop, Console, Old-gen console and Mobile versions)
  • RallyRally(Desktop, Console and Mobile versions)

The Giant Shelly is an enemy found in the Cavern layer. It has two color variants that share identical stats and behavior. Giant Shelly walks around slowly, and occasionally curls into its shell. It then starts spinning and hurls itself at the player, gaining increased defense and dealing high contact damage. Giant Shellies attack very quickly and deal high damage compared with other enemies for the stage in the game where they are found.

Giant Shellies are unique in that their ability to spawn is connected to two other enemies: the Crawdad and the Salamander. Of these three enemies, a world will choose two types that it can spawn, leaving the third inaccessible. Giant Shellies will never spawn in a world that features both Crawdads and Salamanders together. This is taken into account by the Bestiary progression logic (the missing enemy will register as unlocked when the other two exclusive creatures are unlocked) and the banner acquisition (any two of the trio's banners can be used to craft the banner of the missing member of the trio).


  • The Giant Shelly is very similar to the Giant Tortoise and Ice Tortoise. The cooldown between its spin attacks is 6.67 seconds by default. It is reset if the Giant Shelly takes damage.[1]
    • If the Giant Shelly is more than 12.5 tiles away from the player and has an unobstructed line of sight to them, the cooldown is reduced to 2.22 seconds.
    • If it is more than 37.5 tiles away, and has an unobstructed line of sight or is no more than 12.5 tiles above them, it is further reduced to 1.33 seconds.
  • Each spin attack consists of one second of retracting into the shell, spinning for 1.5 seconds, then decelerating until coming to a stop on a solid surface, and coming out of the shell for one second again. Attacking a Giant Shelly at any time cancels the spin attack.[1]
  • If in water when ending a spin attack, the Giant Shelly will use the spin attack again immediately.
  • Although the trajectory of the Giant Shelly during its spin attack is determined the moment it retracts into its shell and is based on the player's position at that time, the enemy does recognize the player's current position, and will slow down very quickly and attempt to drop down as soon as it is above the player.


  • Any weapon with a high rate of attack is effective, as it prevents the Giant Shelly from using its spin attack.
  • Melee weapons are useful as long as the player stays close to the Giant Shelly. Even when not attacking continuously, the spin attack cooldown is much higher at close range.
  • Giant Shellies cannot drop through platforms. Setting up several rows of long platforms significantly reduces the danger of the spin attacks.


  • The BestiaryBestiary entry for the Giant Shelly: "To overcome their slow speed, shellies have developed the ability to hide inside their spiked shell and hurl themselves at their foes."


  • Desktop 1.4.4: Any 2 of Salamander/Shelly/Crawdad Trio's banners can be used to craft the banner of the missing member of the trio.


  1. 1.0 1.1 Information taken from the Desktop version Desktop source code, method AI() in Terraria.NPC.cs. There may be inaccuracies, as the current Desktop version Desktop version is