I'm not sure how big it is compared to other aquariums, but it didn't seem to large to me. It took me about 2 hours to go through, but without the crowds it would probably take about an hour and 15 minutes. The largest tanks are Rainbow Reef which is home to a variety of small tropical fish, Dangerous Lagoon which is home to sharks, rays, turtles, and other fish, the Pacific Kelp Forest which is home to species such as rockfish, wolf eels, and anemones, the Great Lakes which is home to gar, paddlefish, sturgeons, bass, and more, and Ray Bay which is home to southern and cownose rays and bonnethead sharks. Other than those 5 large tanks, the rest of the aquarium is just lots of smaller exhibits that visitors quickly pass by.