hi, I just came back from las vegas myself, and I went to the madalay bay shark reef as well, I was very impressed with how well everything was up kept and the quality of the animals was great. Unlike at ceasars palace, every tank in there had fish that had face and tail rot, hole in the head, HLLE and a few with bacterial infections, I was very very disappointed in this, especially since they had to be some of the nicest setups I have ever seen.