Slime

A slime is a bouncy, cube-shaped creature found mostly in swamps. Slimes are not known to be closely related to any other creature from the Overworld, other then the very closely related tropical slimes, although they are thought to be related related to magma cubes found in the Nether.

Biology
Slimes are cube-shaped creature, encased in an outer layer of a jelly like substance. Despite this, slimes still have eyes and a mouth under this substance. When a slime is damaged it is able split into multiple smaller slimes, however it is believed that the size of the slime changes over time as the slime ages.

Slimes, along with tropical slimes are not known to have any relatives in the Overworld. They are however believed to be related to magma cubes found in some parts of the Nether.

Habitat
Slimes can be found found in many parts of the world but are most commonly found in swamps. They are also found more commonly during moon phases that allow more of the moon to be seen.