Slurtle

The Slurtle is a neutral mob that spawns from Slurtle Mounds found in Caves. They are small and slow, but they have high health and can retreat into their shells, so they are very difficult to kill. When killed, they drop Broken Shells and two Slurtle Slime with a 10% chance of dropping a Shelmet. Every once in awhile they will drop slime while still alive, similar to how beefalo drop manure.

They eat rocks, flint, nitre, gold, and gems. When there aren't any of those rocks around and the character does have rocks in his inventory, the Slurtle will attack the character. A successful hit will knock a rock out of the character's inventory onto the ground (just like frogs), which the Slurtle will then attempt to eat. It will also knock rocks out of a backpack left on the ground or a nearby chest. Upon eating a rock type item, there is a chance for them to drop slime.

When ignited, they will stay in their shells until they explode and deal 300 damage; a useful bomb. They will not drop any items, however.

Slurtles are immune to the Pan Flute.

Snurtle

 * The Snurtle is a more rare variant of the Slurtle who spawns rarely from Slurtle Mounds.

Trivia

 * Slurtle is a portmanteau of slug and turtle
 * If dropped a Shelmet, the Slurtle won't make a breaking noise upon death (as in the breaking noise is when it drops a Broken Shell).
 * Maxwell does not remember creating either the Snurtles or the Slurtles, and Wickerbottom does not recognise it from her homeworld, meaning that it is from nor Maxwell's Universe or Wickerbottom's Homeworld.