Colourless spider type thing?

[Marinebeginner]

My marine tank is 5 months old. I spied this colourless beastie on one of my finger corals just as I turned on the lights. Looks a bit like a spider, circular head / body with long tentacles. The tentacles have rings round them. Difficult to get picture as hiding now but you can maybe see a long tentacle?

 

[User Name]

I may be missing the obvious. But i really don't see anything. Can you draw a circle around it or something? Or maybe even catch it and take some photos?

 

[Marinebeginner]

Hmmm yes well in retrospect I can see why it's difficult to spot in photo - I can just see one tentacle really and that's only because I know where it was! Will try and get better photos over next few days. In mean time if anyone has any ideas of what it might be so that I can search google images that would be great!

 

[Marinebeginner]

Ah- I think it might be a brittle starfish- thanks google!