I've got two serpent stars in my tank that I adopted when a local reefer had his tank crash. Little did I know that they would eat my shrimp and crabs. I have lost a big emerald crab, a nice porcelain crab, a cleaner shrimp and a huge coral banded that I've had forever. I love the stars but I think I like the shrimp better. Are there any stars that are ok with shrimp? The one I have is pretty big, 12" across and that is the one that I caught eating my last shrimp. The other that I've got is about 7" across and is grey/blue color with the spines on its legs being yellow.