More than 150 great white sharks have been spotted since June off the coast of Cape Cod, Massachusetts, a popular East Coast vacation spot, according to scientists.
This week alone, more than 20 great white sharks were spotted off the Cape, prompting three days in a row of beach closures beginning Tuesday. The Atlantic White Shark Conservancy's sharktivity app indicates that 161 sharks have been spotted off the coast of Massachusetts since June 1.
"We've seen more white sharks this past July, the last month, than we did last year at this time," said Gregory Skomal, a marine biologist with the Massachusetts Department of Fish and Game. High water temperatures and a high population of seals, which sharks feed on, off the coast of Cape Cod are attracting them, Skomal said.
The population of great whites is also rebounding after humans exploited the species for a long period. But the increase in shark sightings doesn't necessarily indicate a higher number of sharks off the Cape.
"We have to realize that it's been a really hot summer, and more and more people are going to the beach, more and more people are carrying cellphones, and they have drones and they have all kinds of electronic toys that allow them to see the sharks," Skomal said.
"And so some of these sightings are simply correlated with the fact that there are more people out there paying attention."
The Cape Cod shark frenzy comes amid the Discovery Channel's Shark Week, which drew nearly 35 million total viewers last year. The increased sightings have helped marine biologists by allowing them to tag and track a greater number of sharks. Skomal said the state Department of Fish and Game has been able to tag 15 sharks so far this year, a number not reached until closer to the end of summer last year.
But he also realises that the spate of shark sightings could scare beachgoers, and he has some advice. He said people worried about a shark attack should stay close to shore and steer clear of seals. "The sharks are not here to eat us; they're here to eat the seals. Sadly, they occasionally make a mistake, but it's really a low probability," Skomal said.
Last year, a man died after being attacked by a shark off the coast of Cape Cod. He was the first to die from a shark attack in Massachusetts since 1936.