11 great white sharks were spotted over the last two days. Marine biologist Greg Skomal tagged three of the great whites spotted off Cape Cod.
Last year, a great white nearly snatched him off his research boat. Social media this year has featured video of sharks terrifyingly close to swimmers in Florida.
Marine biologists think the main reason they're seeing more sharks off the East Coast is an abundance of food. Since becoming a protected species, the gray seal population off Cape Cod has exploded.