Any idea on what these are?

[tywinter16]

I purchased a BTA and was waiting for it to drop some reactor media h
He grabbed on to. I left the media (2 or 3 pieces) in my tank for about a week and these popped out. Just wondering what they were? Any help is always appreciated!

 

[fishguy242]

@KJ ??

 

[1guydude]

Is that a melted anenome? Im sorry idk what im looking at. Looks like an exoskelton from a worm. The other looks like a melted ball of anenome.
D

 

[fishguy242]

i'm thinking media expelled by nem ?