need help id this dark blob on a frag plug

[greg0385]

I had this begin to bleach so i moved it down and notice this BB size dark blob on the underside. It has a fork body part that retracts into the blob occasionaly.

The blob is on the left in the dark area of the plug

Thanks
Greg

 

[_Alex_]

hard to tell by the picture, but there are different kinds of worms and creatures that make little blobs to live in lol.

 

[greg0385]

Bump, any other thoughs on what this is?