Shark proof cage
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A shark proof cage is a cage which is lowered into the ocean, and in which a SCUBA diver enters, to examine sharks up close more safely. Shark proof cages are built very strong, in order to withstand the strength of a shark ramming the cage. However, many such cages are not actually shark proof, as a determined shark can still compromise the cage. Rather, they provide a visual and tactile deterrent to the shark. Cage diving allows people to get up close to harmful sharks, like the great white shark and the bull shark, without being severely injured or killed.