That’s according to this article which features an aquarium built by a man called Jack Heathcote. He has built a custom made aquarium underneath his living room. Measuring 12ft 6in x 12ft 8in x 7ft it is the same size as the room above. It also has a viewing window so you can see the fish inside. It currently houses two chainsaw doradids, three 2ft long Pacus, some Pangasius, a Red tail hybrid catfish, two alligator gars, eight enormous stingrays and two Fly River turtles.