Great white sharks are the species responsible for most human shark-bite fatalities, and often attack their prey from underneath, lead researcher Laura Ryan said. This means that sometimes the sharks mistake a surfer's silhouette for the outline of a seal.

Every year, there are an estimated average of 63 unprovoked shark attacks around the world, with just five or six leading to death. While the numbers might not be staggering, the fear people have about a "Jaws-" like encounter is very real.

Every day, Cole Taschman heads out to Bathtub Beach in Stuart, Florida. The quiet reef on the Atlantic Coast got its name from the “bathtub effect” which breaks up waves, creates a shallow pool at low tide and reduces erosion. For Cole and the Taschman family, who consider the beach their backyard, it is known for something else.