There are currently 13 species of sharks on display in Shark Bay, including one Scalloped Hammerhead Shark Sphyrna lewini.
I haven't seen many other large shark exhibits in US facilities, but this is certainly the best of the few that I've seen. It's huge, clean, deep and the animals all appear to be very settled and comfortable. The exhibit is completely open to the environment, so the animals all receive natural light cycles.