Imagine being able to study a living ecosystem as it adapts and unfolds right before your eyes. This miraculous sphere contains a precise balance of earth, water, air and living organisms that work together in harmony. Filled with seawater, the sphere is home to tiny red shrimp, algae that create oxygen, microbes that feed the algae, and a gorgonia sprig, gravel, shells and glass that provide hiding places. A complete living world! Initially developed by NASA scientists to study Earth's biosphere Available in round or oval shape Each Ecosphere has a typical life cycle of 2 to 3 years; can last up to 10 years Keep out of direct sunlight Order by 12/17 to ensure arrival by 12/24 --> Sorry, no shipments to AK, HI, PR or VI Sending this item as a gift? Please note that shipping starts immediately Faster shipping is not available for this item This item has a $10 additional shipping charge each Note: To ensure proper delivery of this item, please call us at 1-888-833-1412 to order the Ecospheres Glass sphere filled with seawater, red shrimp, gravel, algae, gorgonia sprig and microbes 4" Round Ecosphere is 3-1/2" high 5" Oval Ecosphere is 3" diameter and 5" high