Hammer Coral....growing...bubbles?!?
 

Sooooo....I picked up this nice little hammer coral, and after a week of it looking great, and flowering out nicely, it starts to look like it has bubbles pushing out from between it's "Branches" not lots of them. may 2 or 3 max...but they are quite large....whats up with that?

Pic might help you get a quicker answer

It happens, probably nothing to be concerned about. Check the following links.

http://www.canreef.com/vbulletin/showthread.php?t=65085

http://www.canreef.com/vbulletin/showthread.php?t=62003

Mine did this several times when it was small (frag). It turned out that it was part of the process of creating new heads. Every time a bubble showed up, it would go down a few days later and the head it was in would have split in two (easiest seen at night when the coral polyps are pulled in). When the hammer grew larger, I didn't notice it doing this as much as the new heads seemed to grow from the skeleton, which there wasn't much of as a frag. I wouldn't worry about it.