HELP! bloated starfish? Missing hermits?
 

I have an Indonesian red starfish whom I just discovered is in a bloated star shape on the bottom of my tank. It was fine four hours ago when I last recall directly looking at him.

I just found him with a hermit shell at his mouth (disk), and all puffed up like he's been inflated with air. I've quarentined him/it, and now I'm not sure on what to do.

http://www.canreef.com/photopost/sho...php?photo=1387 (starfish)

Anyone heard of this?

All parameteres test fine...I did find an acro crab this morning in my new acro, as well as the discovery of bristle worms last night.

I've also noticed a sudden decline in my blue hermit population. Maybe they're all hiding but suddenly there aren't many to find. Someone suggested that I might have a wild crab hitchhiker... if I have one, how do I catch it or find it?