This is a harlequin serpent starfish. Black and light brown alternating pattern. My other (ugly) serpent starfish in the third tank seems to be without problems, but it also eats krill on a regular basis. I rarely see the harlequin. I don't think I would chance him in the third tank if I could catch him, but he might do okay in the big fish tank. Think?

I haven't heard clicking, but have a motor that is making some noise. I am going to cross my fingers and hope that I don't have a mantis.