Softy ID?

[Triggerfish]

its almost pure white. at night the polyps close up tight into base.
some type of tree coral?

 

[cloak]

It looks like a Kenya tree coral to me. I'm not sure why it would be white though.

http://www.liveaquaria.com/product/prod_display.cfm?c=597+1492+2295+2360&pcatid=2360

 

[electrotech]

Kenya tree

 

[Triggerfish]

yeah.. its pretty white. the polyps retract into the base like a toadstool.