Abstract: An elevated aquarium tank comprising at least a pair of superimposed spaced apart compartments or chambers, and conduit means placing the lower chamber in communication with the upper chamber. After the aquarium tank is filled with water such that the lower chamber and the conduits are entirely filled with water, and the upper chamber is filled to an appropriate level, fish placed in the aquarium are able to swim from the lower to the upper chamber, and vice versa, through the conduits. The space between the panels forming the top of the lower chamber and the panel forming the bottom of the upper chamber forms a display shelf for art objects, flowers, plants, pictures and the like or, alternatively, the space may be enclosed entirely or partially with a lattice or grillwork and form a bird cage.