What i the world is this???

[bagged87blayzer]

I moved one of my rocks ad o the back of it I found this. What is it? All I know is it is soft....
Sorry if the pic is crappy my lights are not even on yet.

 

[Swirlygig]

looks like a type of sponge, no worries...they sponges grow in the hard to reach places

 

[ucfwakeboarder]

my guess is a sponge... be weary of touching things though I knew about fire worms but learned the hard way when I picked up a rock the other day and put my fingers under the bottom without lifting first ZAP! it's basically like touching a cactus... I had about 100 or so of those spines in me... could've hurt a lot worse with what I had been told