Yeah. Duncan's grow like crazy.
Here is a pic of mine when I first got them. The pic is dated 4/1/2010 and there were 3 little heads.

Here is one from 9/28/2010. They had grown several new heads in a little under 6 months.

Here is a fairly recent photo. I just counted and there are at least 19 heads! He was recently mauled by a Bristletailed Filefish that I added to clean up Majano Anemones. His polyps have been withdrawn, but are coming out a little more each day.
