What is this?

[darylb94]

I bought a leather today and this was hanging off it. It feels the same as the leather but I'm not quiet sure what it could be

 

[TriggerThis]

Idk what it is and there was one on my leather frag too but I deff got it out of my tank as fast as I could. It wasn't anything I wanted in there

 

[Connie]

Looks like a sponge.

 

[darylb94]

Cheers also what would you say this is? A devils hand or a toadstool

 

[EricTMah]

^That looks like a toadstool.