I think there is often a period in most people's childhoods where your dream is to be a Marine Biologist (along with an Astronaut, Paleontologist, and a Archaeologist).
Sharks were always my favorite and I would read about them constantly. There are over 200 species of sharks and less than 20 of them can be considered "man-eating". Sharks typically feed at twilight, so as long as you are out of the water at that time, you should have nothing to worry about.
Sharks are 400 million years old, with modern sharks dating back 100 million years. The largest shark species today is the Whale Shark, which can grow to be 40ft long. The largest man-eating shark is the Great White which only grows to half that size.
Poaching has gotten worse over the years with shark-fin soup being a popular asian dish and people selling shark jawbones.
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