[combs44]

I'm sorry, I misread your post!! I didn't see that you said it looked like a serpant star. Those I'm not sure about. I do; however, have some mini brittle stars in my tank. They are white also, and have longer stringier legs. Kind of like a serpant, but with little spines sticking off of them. To my knowledge they are harmless, and will probably ultimately die off. Hope that helps.