What's Growing on Toadstool?

[Aspect]

Noticed this on my toadstool, it is hard to the touch, might have been soft until I touched it but I'm not sure

 

[Aspect]

Oh wow it's a crab I just watched it walk off when I kept the light on it. What kind of crab do we think it is?

 

[Aspect]

Around the size of a dime

 

[Aspect]

Bump

 

[Evil1]

Hard to tell but looks like a porcelain crab.

 

[Aspect]

Hard to tell but looks like a porcelain crab.

It is beige almost white. Kind of like planted itself in the cap