Sharks are amazing fish that have been around since long before the dinosaurs existed. They live in waters all over the world, in every ocean, and even in some rivers and lakes. \r
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Unlike bony fish, sharks have no bones; their skeleton is made of cartilage, which is a tough, fibrous substance, not nearly as hard as bone. Sharks also have no swim bladder (unlike bony fish). There are more than 465 known species of sharks living in our oceans today. Sharks are an apex predator at or near the top of their marine food chains, and they regulate the populations of species below them. Research has shown that massive depletion of sharks has cascading effects throughout the oceans ecosystems. One shark that never had been successfully held in captivity for long was the great white. But in September 2004 the Monterey Bay Aquarium successfully kept a young female great white shark for 198 days before releasing her back into the wild.\r
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Shark Aquariums. The most common size for a home aquarium tank is probably 29 or 30 gallon, though some aquarists have constructed aquariums of many thousands of gallons. Public aquariums can be dramatically larger than any home aquarium. But only a few are big enough to make it to our list of largest aquariums in the world. The kind of aquarium that can hold whale sharks and manta rays. It takes a very large tank to hold these kind of aquatic creatures.\r
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In order to compare these large aquariums we have looked at the size of their biggest tank (in gallons). Most aquariums have several tanks and the combined volume of water can be much larger but it is only the largest aquarium tank that is counted. So heres a list of the largest aquariums in the world.\r
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10. Aquarium of Western Australia (0,8 million gallons)\r
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9. Aquarium of Genoa (about 1 million gallons)\r
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8. Shanghai Ocean Aquarium (about 1 million gallons)\r
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7. uShaka Marine World (about 1 million gallons)\r
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6. Monterey Bay Aquarium (1,2 million gallons).\r
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5. Turkuazoo (1,32 million gallons)\r
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4. LOceanografic (1,85 million gallons)\r
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3. Okinawa Churaumi Aquarium (1,98 million gallons)\r
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2. Dubai Mall Aquarium (2,64 million gallons)\r
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1. Georgia Aquarium (6,3 million gallons)\r
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