1 day after people; The power goes out in New Orleans. The emergeny generators of the Audubon Aquarium of the Americas kick in, and the animals at the aquarium are safe for now. But the emergeny generators can't run forever.
1 week after people; The emergeny generators of the Audubon Aquarium of the Americas fail and the complex loses power. The jellyfish are the first fish to die as they depend on artificial water currents to live. No wast is removed from the water and the ammount of ammonia in the water increases while the ammount of oxygen decrease. Fish such as snappers and sharks hemorrhage and suffocate to death on their own waste. The only fish that remain alive in the aquarium are tarpons due to their ability to also breath air, however, with no people to feed them, the tarpons and other air-breathing animals such as the sea-otters, sea turtles, seals and penguins will eventually starve to death. The aquarium's rare white alligator enters a torpid state in an attempt to survive the famine.
1 year after people; The white alligator, the aquarium's last animal, finally dies. However it might be possible that it ate rats the came to the aquariums or the carcasses of the dead aquarium animals.