The aquarium closed down last November. Here is an excerpt from a press release that the zoo put out last September:
"This November, the Zoo will close the aquarium galleries at Aquaticus. The upgrades necessary to bring the 30-year-old aquarium habitats and associated support areas to or above accreditation standards would be prohibitively expensive.
Because we strive for the highest standards for our existing and planned habitats, we have decided to close the 32 aquariums and transfer the fish and other animals to other zoos and aquariums. It’s important to stress that only the aquariums on the lower levels will be closing this November. The upper level of Aquaticus will continue to be home for seals and sea lions, and the sea lion presentations will continue daily."