Possible starfish?

[Beaux]

I do not have a photo to attach to this post just yet, it is hidden at the moment. But it looks as if some how this thing pulled a stowaway to get into my tank. I would think it would be a lot larger since it had been so long since I have added anything.

It is all white, and resembles a starfish, except is half the size of a pinky fingernail. I have seen it twice and it was climbing the tank glass. It falls or gets knocked off before I can get a pic of it. I will add a photo when I get it later. But for now does it sound like a starfish, because it sure resembles one.

All white, like bleached out white. Largest in the center and has the ends pointed like one.

If it should turn out to be one, anyone want it? I have no clue about them and would most likely end up killing it from lack of knowledge.  

I have only seen it from the top side, and only briefly. It does not seem to have any type of texture to it. It looks slick not bumpy.