The ocean sunfish, Mola mola, or common mola, is the heaviest known bony fish in the world. It has an average adult weight of 1,000 kg (2,200 lb). The species is native to tropical and temperate waters around the globe. It resembles a fish head with a tail, and its main body is flattened laterally. Sunfish can be as tall as they are long when their dorsal and ventral fins are extended.
Sunfish live on a diet that consists mainly of jellyfish, but because this diet is nutritionally poor, they consume large amounts in order to develop and maintain their great bulk. Females of the species can produce more eggs than any other known vertebrate. Sunfish fry resemble miniature pufferfish, with large pectoral fins, a tail fin and body spines uncharacteristic of adult sunfish.
Adult sunfish are vulnerable to few natural predators, but sea lions, orcas and sharks will consume them. Among humans, sunfish are considered a delicacy in some parts of the world, including Japan, the Korean peninsula and Taiwan. In the EU, regulations ban the sale of fish and fishery products derived of the Molidae family. Sunfish are frequently, though accidentally, caught in gillnets, and are also vulnerable to harm or death from encounters with floating trash, such as plastic bags.
The Monterey Bay Aquarium (MBA) was founded in 1984 and is located on the site of a former sardine cannery on Cannery Row of the Pacific Ocean shoreline in Monterey, California. It has an annual attendance of 1.8 million visitors. It holds thousands of plants and animals, representing 623 separate named species on display. The aquarium benefits by a high circulation of fresh ocean water which is obtained through pipes which pump it in continuously from Monterey Bay.
Among the aquarium's numerous exhibits, two are of particular note: The centerpiece of the Ocean's Edge Wing is a 10 meter (33-foot) high 1.3 million liter (1/3 million gallon) tank for viewing California coastal marine life. In this tank, the aquarium was the first in the world to grow live California Giant Kelp using a wave machine at the top of the tank (water movement is a necessary precondition for keeping Giant Kelp, which absorbs nutrients from surrounding water and requires turbidity), allowing sunlight in through the open tank top, and circulation of raw seawater from the Bay. The second exhibit of note is a 4.5 million liter (1.2 million gallon) tank in the Open Sea galleries (formerly the Outer Bay), which features one of the world's largest single-paned windows. Crafted by a Japanese company, the acrylic window is actually five panes seamlessly glued together through a proprietary process.
Sealife on exhibit includes stingrays, jellyfish, sea otters, and numerous other native marine species, which can be viewed above and below the waterline. MBA is one of very few aquariums in the world to exhibit both bluefin and yellowfin tuna. For displaying jellyfish, it uses a Kreisel tank, which creates a circular flow to support and suspend the jellies. Visitors are able to inspect the creatures of the kelp forest at several levels in the building. The aquarium does not house mammals other than otters.