The Bioluminescent Bio-Orb is a 15cm (6-inch) glass micro-aquarium filled with bioluminescent PyroDinos (plant-plankton/algae). The Large Bioluminescent Bio-Orb is spectacular when swirled at night. The natural light produced by the PyroDinos (living algae) in the Bio-Orb is called bioluminescence. PyroDinos use light to grow (like a plant) and create a brilliant blue light at night. The Large Bioluminescent Bio-Orb offers a complete system to grow PyroDinos. The Bio-Orb is a glass sphere with a flat bottom and a specially designed stopper to allow air exchange but prevents excessive evaporation. The Bio-Orb provides the ideal environment for growing PyroDinos at home, in the office or school.