The researchers extracted information by comparing how seals, sea lions and humans sound in the water. Data published in the Australian Shark Attack File found that most people surf when attacked (Phillips). The mistaken identity theory is a good observation about why sharks attack humans. Taronga Zoo conducted a useful experiment to allow people to rationalize why sharks might attack humans. This seems to be the most logical reason why. When surfers put on their wetsuits and are on surfboards, they resemble what a seal looks like to a shark. Humans have body types similar to that of a seal. Although humans often fear sharks, the chances of being attacked are very low. On average there are only sixty-five shark attacks per year. A person is thirty times more likely to be struck by lightning. Sharks injure approximately thirteen people a year, but approximately two hundred thousand are injured in accidents involving ladders, toilets and chainsaws. The chances of being attacked by a shark are very low compared to all the other dangers in the world. Researchers are trying to explain to people through this theory that sharks do not intentionally attack humans, but simply mistake humans for their normal prey. The sharks also propose one last theory which is the social and defense theory. The animal's instinct is to protect its territory. The final theory as to why sharks attack humans is the social and defense theory. By comparison, humans