The Sand Sifting Sea Starfish has beige brown body with lateral spines extending up from its five arms.ÿ The spines allow the starfish to move through the sandy bottom of the tank.ÿ This starfish is great for reef aquariums and is able to siftÿthrough large amounts of sand thereby cleaning and aerating it.ÿ Never expose to air or house with Puffers.ÿ