Hi Pete...the green coral w/ pinkish tips right? That is a torch coral. Usually they are a brown color w/ cream colored tips...finding green ones is a little more difficult.
I had to move it from the nano to one of my larger tanks though...the froggy is still there,but the torch was reaching too close for comfort.Euphyllias have sweeper tentacles and I feed my corals so they grow pretty quick.
I work at an LFS.
Tank was transferred from a 3 gal eclipse that was modified~set up was March 05..transferred in Aug 05,and some items added .Thanks for the compliments...you can do this too,just take your time choosing pieces,be selective,research first,and learn patience.