dip the ******** out of that thing, then qt if for awhile. Not worth it
If you see an adult then most likely there's egg in there too. Like this is me said, throw it away if no qt or you'll find yourself dipping corals for the next couple months.
googling AEFW yeilds this photo-
which doesnt look like what you have there.
Almost looks like these (Amphiscolops langerhansi):
http://www.reefcentral.com/forums/showthread.php?t=1659713