For simplicity, only areas accessible are shown here, keep in mind an aquarium has quite a few mechanical and electrical considerations, tunnels and areas used for maintenance are not shown. Also there is a second level, which allows for access to the the tanks housing the fish and other specimens. Tanks are not accessible from the main area (mainly to keep people from sticking their hands or dropping pennies into the water. Only those given access keys (marine biologists, maintenance crews) can go to the upper areas.