I just got an acropora gomezi colony from Live Aquaria today and found something interesting/strange. The first pic shows some white spots on the tips in a few places on the coral. I wasnt sure if the tissue was dying, or if they were 'growth tips'. After getting it into the tank these areas were the first to show signs of activity. It looks like feather duster worms live in these spots. However, they open in a sweeping motion - like a fan - very rapidly. Tried to get a good pic, but no go, so I used PhotoS to zoom in on an area. Anyone know what it could be?