I found a star fish that is about the size of the head of a plastic thumb tac in my reef tank. It has six legs instead of five, is this a certian species, of just a freak of nature. Also are many of the star fish reef safe? He is light beige and it looks like he may little brown speckles on him, and not like a brittle his legs are short. Now he just went wandering and I dont know if I will ever find him again, unless he goes or starts to climb the glass again. It's great my tank has been set up for about a month now, moved from a 12 gal nano tank to a 75, and I am finding all kinds of weird things.