Cynthia Gutierrez, 15, and her sister Jenny, 10, examine a Moon Jelly (Aurelia aurita) at Heal the Bay’s Santa Monica Pier Aquarium during its Ocean Appreciation Celebration on Sunday, August 24, 2008. Ocean Appreciation Celebration marks the debut of an exhibit featuring a 180-gallon jelly kreisel, a circular tank specially designed to protect the delicate structure of the approximately 40 moon jellies on display. Moon jelly are probably the most common and widely recognized type of jellyfish. They can be found in the Atlantic, Arctic and Pacific Oceans near the coasts. The animal ranges in size from 5cm to 40cm across. The moon jelly is easily recognizable by its four violet or pink crescent shaped gonads on the underside and at the center of its translucent bell or umbrella. Like many other species of jellyfish, the moon jelly’s ability to move by itself is limited, so it is subjected to the water currents of the ocean.