There’s something lurking in the water at several south Florida beaches.
Hundreds of swarming sharks, some as close as 10 feet offshore, have closed down beaches in Broward and Palm Beach counties.
"The water clarity has been so good" that it's been easier than usual to see the annual migration, Bob Taylor, superintendent for lifeguards at Delray Beach, told NBC's "Today" show.
The sharks have been repeatedly spotted near shore over the past two weeks.
John Carlson, a shark expert with the National Marine Fisheries Service, told "Today" that most are blacktip and spinner sharks on their annual migration to nursing areas as far north as North Carolina.
The migration north could last a couple more weeks, he added. Once in the nursing areas, the female sharks will give birth to pups, and then the sharks will return south in the fall, he said.
Although these sharks aren’t considered “man-eaters,” they have been known to bite swimmers.