jalb sent me some pics to help identify a) anenomes (yes, they are aiptasia and you will want to gt rid of them!) and b) slug--which I think it a stomatella. Member of the snail family, they carry their shell inside, and are good detrivores.
Yep Aiptasia and Stomatella snails. Great snails that are real workhorses. A healthy addition to the cleanup crew that often arrives as freebees on liverock. They also breed quite readily in an established tank.
