Aquarium parks like the one in Newport, KY or the Tennessee Aquarium are often asked why they don't keep very many of the big animals like whales . The answer is fairly easy but has nothing to do with building a large enough water area. The Tennessee aquarium often uses it Manta Ray as an example . This giant ray weighs 1 ton or 2,000 lbs. Using the pyramid of energy , fill out how much food is required at each step just to keep this one tone animal Stive