Magma Cube

Magma Cubes are a hostile mob found around The Nether. When killed, they leave smaller versions of themselves, then dying and leaving Experience Orbs. When they move, they jump up and momentarily unravel into several layers, giving them the appearance of a spring and revealing a molten lava core inside. They can't swim in lava, but they do NOT drown. It does have some limited movement capability when under lava.

Trivia

 * Magma Cubes can not jump out of lava if the lava is too deep.
 * Magma Cubes seem to be the Nether equivalent of Slimes and appear to use the same skin, but recolored.
 * Magma Cubes are quite abundant in the new Nether Ruins that were added by Jeb.

Gallery
Адский слизень