Brain corals also have the amazing ability to uncover themselves. Sort of like moving but only virtically. When covered in sand, the brain coral can swell up and push sand out from around it. As it does this it slowly rises up. After doing this several time a brain coral can completely uncover itself. Unless of course it gets buried really deep.
Just a little added insight.
--Shawn--
[ September 25, 2001: Message edited by: H2O-boy ]