The top is a coral...not certain what kind. It came already on the rock...and I'm still learning! It is 120 gallons...but I took the photo from one of the ends. It's kind of neat because it's like looking up a hill.
K...a few more shots. If I take a photo of the entire tank...you can't really identify stuff...so I took some 'quarter' shots. :) I also took a photo of the 'guts' of my tank in the basement. It's the brains of the operation. lol