Need ID help

[fuzzyt]

Found this the other day. I thought it was part of the rock until it deflated when one of my clowns got close.

Here it is deflated
http://www.bratakiss.com/images/Tank/deflate.jpg

Here it is inflated
http://www.bratakiss.com/images/Tank/inflate.jpg

Any help would be appreciated.

Thanks!

 

[Leopard Wrasse]

Looks like a tunicate, most likely harmless.

 

[fuzzyt]

From what I've read, that pretty much matches it. It gets pretty hard to search for information when you don't know what anything is called. "Bubbly thing with tubes in it" just didn't produce the right results.

Thanks!