Yep it's aiptasia.

Wayne Sallee
Wayne's Pets



Steve wrote on 5/20/2006 5:30 AM:
On Sat, 20 May 2006 02:39:09 GMT, "SalahiAndSon"
wrote:

Heres another pic I took. Found 2 more of these things...

http://home.austin.rr.com/salahiandson/whoami5.jpg

Looks very like aiptasia to me. They are a pain. There are many ways
to kill them, but they are hard to erradicate. I've just broken down
an old tank that had them, and picked out what I think are a few
pieces of clean rock to start a new mini-reef. I'm keeping my fingers
crossed, don't want those things again...

Steve