Slime star may refer to various starfish known for their ability to defend themselves by expelling large amounts of mucus:
Pterasteridae, a family of starfish sometimes generally called the "slime stars," including: Hymenaster, a genus sometimes referred to collectively as the "slime stars" Pteraster, a genus sometimes referred to collectively as the "slime stars" Pteraster tesselatus, a North Pacific species with the common names "slime star" and "cushion star" The leather star (Dermasterias imbricata), a North Pacific species less commonly referred to as a "slime star"