It dosn't change to white when it is retracted. It stays about the same color as the picture a brownish purple. I've looked at pictures of cladiella before and they don't seem to look anything like this or are they all different.
I agree with the above posts, it's probably from the family Alcyoniidae which includes the Cladiella genus. As written already by MickAv8r the common name Colt coral is a very broad name used to refer to many corals in this family because so many are hard to identify.
<blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr>Originally posted by troyrb:
<strong>I know this sounds dumb but I got this coral the other day and now I can't for the life of me remember the name or it. Does any one know?
</strong><hr></blockquote>
Looks just like my colt coral...so I would say it's a colt...