Anyone know what's wrong with my toadstool?

[Justin1997]

Hey guys I've had this toadstool about 4 years now I've never seen it do this before. It hasn't opened in a few days and now I noticed it's developed this lump.
Anyone know what it is?

 

[cloak]

Are you sure that's part of the coral and not something else? If it is then it might be trying to reproduce, although I've never really seen it look like that before. Hmm.

 

[killingseed2000]

look like its branching off a baby.

 

[Justin1997]

Yea other than the polyps not coming out the last few days it has looked healthy,
I'll post some more pics if it ends up being a baby

thanks guys