Slimes are mobs added by VanillaMinecraft. Mods found in Hexxit add variants to slimes, such as the Blue Slime, Maze Slime, King Slime, Slime Beetle, Ectoplasm, and Hemoglobin. Vanilla Slimes come in all sizes and spawns in levels 0 through 39 in specific chunks, any light level and in Swamp biomes on levels 51 through 69, light level < 8. There are 3 sizes of slimes that spawn naturally. Tiny, Small, and big. When killed, splits into more except when it is tiny.