Question about hammer coral

[Jeff Jarry reef]

My hammer coral has big bubbles on it at least two I can see. Any ideas what's going on thank you

 

[JDnKY]

They do that sometimes when they get larger and are splitting. I have a large hammer with a couple of bubbles and a larger frogspawn with a couple as well right now. They have been doing that since they were about baseball size. I was worried the first time and asked on here and found that it’s pretty common.

 

[Jeff Jarry reef]

They do that sometimes when they get larger and are splitting. I have a large hammer with a couple of bubbles and a larger frogspawn with a couple as well right now. They have been doing that since they were about baseball size. I was worried the first time and asked on here and found that it’s pretty common.

Ok thanks this thing has gotten bigger lately. It looks crazy. Thank you