Minecraft Slime

Slimes are perhaps the most elusive type of hostile mob in the game. They can only spawn in specific chunks (16×16 areas that reach to the top and bottom of the map) that are randomly determined according to the server’s seed as terrain is generated. On top of that, they are only found in the lowest 40 block layers of the map. Slimes can spawn in one of three sizes: big, small and tiny. When slain, a big slime turns into multiple small slimes and small slimes splits into tiny slimes. Only tiny slimes can drop the slimeball resource.

Health Points
Big: 16
Small: 4
Tiny: 1
Attack Strength
Big: 4
Small: 2
Tiny: 0 (pushing only)
Big: 4
Small: 2
Tiny: 1
Spawn: Up to level 40 in certain chunks, no lighting restrictions
Network ID: 55
Savegame ID: Slime
Drops: Tiny slime drops between 0 and 2 slimeballs. Big and small slimes split into smaller slimes.

Minecraft Slime


Slimes have no arms or legs, so they must hop to move around. Slimes always travel forwards in a straight line until they come within a 16 block radius of a player. Slimes automatically detect players in this radius and immediately attempt to travel towards them. Big and small slimes are capable of pushing and damaging other entities, including players, but tiny slimes are unable to deal damage.

While slimes only naturally occur in one of three sizes, they can be spawned as big as 256 blocks through server modifications. Since a slime’s damage and health is directly related to its size through several simple calculations, a huge spawned slime is capable of instantly killing players in survival mode. An unnaturally large slime will break into smaller slimes that are half of its size, so a slime 256 blocks wide will split into multiple slimes of 128 blocks wide.

Large Small and Tiny Slimes

Slimes are vulnerable to the same forms of damage that other mobs are, including fire, lava, weapons, explosions and suffocation. Players can locate slimes in caverns by looking for green ooze dripping from the ceiling, or listening for the sound of their hopping. Slimes can seep downwards through solid blocks in order to pursue players in underground areas.


Predicting slime spawns in order to efficiently farm slimeballs can be at tricky process, mostly due to the difficulty of finding and isolating a terrain chunk with the slime-spawning seed. About 1 out of 10 terrain chunks can spawn slimes, so players must explore a significant amount of low-lying or underground areas to find a place to gather slimeballs. There are various third-party and community developed programs available to help players locate slime-spawning chunks in their server file.

In order for a slime to spawn and remain in existence, a player character must be within 30 to 100 blocks of their location. Slimes will despawn if the player wanders too far away, much like other types of hostile mobs. Big slimes need an open cubical space that is at least 3x3x3 in order to spawn. Small slimes require a 3x3x2 area, while tiny slimes only need a 1x1x2 space. Tiny slimes can spawn in a 1x1x1 area if the block above the opening is not opaque.

In non-standard flatland worlds, all of the terrain spawns only a few block layers above the bottom bedrock. This allows slimes to spawn freely and frequently on the surface, so they are much easier to reliably find on this type of map. Since slimes only spawn at 10 percent the rate of other hostile mobs, they can still be hard to find on flatland worlds, and is even more difficult in normal terrain.


Players on survival mode servers must locate a slime-spawning chunk before they can even begin the arduous task of gathering a large quantity of slimeballs. The easiest way to find an appropriate chunk is to explore large stretches of open areas underground. Caverns, ravines and mineshafts all present great opportunities for slime spawn exploration. Remember to stay below the 40th layer when looking for slime-enabled chunks.

Minecraft Slime Farming

Alternatively, players can systematically clear a single large cavern until slimes begin to spawn. Since chunks are only 16 blocks wide and long, it is only a matter of time before a single large cavern includes at least 1 slime-spawning chunk. This process is very tedious and time-consuming, but reliably produces results.

Once a player is able to identify a slime-spawning chunk, farming them is simply a matter of hollowing out small rooms that are at least 3x3x3 within that chunk. Lighting the rooms prevents other mob types from spawning, which will increase the rate at which slimes appear in the area. If too many other mobs, like skeletons and zombies, spawn in a chunk, then the game’s code will not allow slimes to spawn until some of the other mobs are killed or despawn. Excess mobs can prevent slimes from appearing even if the chunk can spawn slimes.

Fire and water traps can kill slimes as they spawn, so they have some use in monster grinder contraptions. Burning blocks, like netherack, can kill slimes, but there is a small risk that the slimeballs will also be destroyed by the fire. Slimes can also be drowned, leaving the slimeballs behind to be collected by the player.


The slime mob was added during the Seecret Friday 6! update in the Alpha 1.0.11 version of the game, making them the fifth oldest hostile mob. However, slimes did not drop slimeballs until a much later Beta version of the game. Since their introduction, developers have made several significant adjustments to balance spawn rate and behavior of slime mobs.

Interesting Facts

  • There are numerous programs available to players to help locate slime-spawning chunks on their servers.
  • Slimes resemble the “gelatinous cube,” a classic enemy found in many fantasy and role-playing games, including Dungeons and Dragons.
  • The slime mob is the origin of the newer magma cube mob, which was introduced to Minecraft in Beta 1.9.
  • Big slimes have the potential to give up to 28 experience points.
  • Each time a slime is slain, even if it splits into smaller slimes, it drops several experience units.

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