Abstract: An animal enclosure cover may be provided on an animal enclosure (such as an aquarium) to prevent the escape of animals therein. The animal enclosure cover includes a stationary panel and one or more clamping members, wherein the clamping members are used to affix the stationary panel atop the animal enclosure. The stationary panel is bounded by a peripheral frame having opposing upper and lower surfaces. Each clamping member similarly has opposing upper and lower surfaces, and the clamping member upper surfaces are shaped to extend in parallel relation to at least a portion of the peripheral frame of the stationary panel. The stationary panel may therefore be fit on the top rim surface of the enclosure rim of the animal enclosure, and each of the clamping members may be fit below the enclosure rim with the upper surfaces of the clamping members being aligned in parallel spaced relationship to the lower surface of the stationary panel.