Anenome issues

[oceansh]

I have had this anenome for a couple of years now. It's stomach has protruded for about 5 months, and then two months ago this slimy mucous came out. It is still alive, still very sticky, eats (but does close up), and hasn't moved.

We were overfeeding it, both my husband and myself feed it...
We haven't fed it for months now, just eats what ever it catches in the water. Anyone have any ideas as to what might be up with it?