How does branching hammer grow heads?

[Rekonn]

Recently got a branching hammer frag, and was wondering how this one grows additional heads. Does one head split into multiple like a candy cane? Or does it sprout a new head from the side?

 

[flipteg]

it does both split (sometimes into 3) and bud off new polyps around the sides...

 

[Rekonn]

Cool. For fragging purposes, how far below the head should the cut be made?

 

[Sk8r]

Include, I'd say, about half an inch minimum below the last live tissue, and I'd glue the stub to another rock to keep bristleworms from colonizing it---imho, it is one place where they can be a nuisance, inside the honeycomb structure of a fragged lps.