Editor's note: Happy Shark Week! All week long we'll be re-capping some highlights from Shark Week programming, starting with today, and "Great White Invasion."
Great white sharks appear to be more common than ever nowadays, according to “Great White Invasion,” which aired last night as a part of Shark Week's first night of programming. The episode tracked these huge predators as they encroach on popular beaches from Australia to South Africa to southern California.
Why they are coming closer to shore is not completely understood, but scientists point to the availability of fish as well as the opportunity for sharks to sunbathe and enjoy higher oxygen levels in shallower waters as possible explanations. And even though the number of annual shark attacks worldwide has risen in recent years, it is still extremely low compared to the number of beachgoers.
So are great whites really “invading” our coastlines? Not quite. In fact, according to the Census for Marine Life, scientists estimate that there are only about 3,500 great white sharks left in the entire world. Of these, an estimated 219 live off the central California coast, so in reality, sharks aren’t exactly swarming in our oceans just yet.