ATLANTIC CITY, NJ — Great white shark Mary Lee is moving north and has been tracked less than 10 miles off the Jersey coast, near Atlantic City. Her last ping was recorded at 7:11 a.m. today,  May 31, by Ocearch’s Global Shark Tracker.

Her traveling mate, Cisco, has not been pinged since 12:13 a.m. on May 30, so there is no further information on his whereabouts. He was last tracked at about some 20 to 30 miles off New Jersey's southern-most tip near Cape May.

The 16-foot, 3,500-pound Mary Lee has traveled up and down the East Coast a total of some 40,000 miles since she was tagged off Cape Cod on September 17, 2012. Since Cisco was tagged off Nantucket, Mass. on October 7, 2016, the nearly 9-foot, 362-pound immature great white has traveled a total of some 2,300 miles.

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Ocearch registers a ping when the shark’s dorsal fin breaks through the water, transmitting a signal that provides an estimated location. The group then displays a marker on a Google Earth map indicating where the ping was received.

It is the time of the year when great white sharks leave their winter locations along the southeastern United States as water temperatures begin to climb and they head north to colder waters, according to Ocearch, the Park City, Utah-based leader in generating critical scientific data related to tracking (telemetry) and biological studies of keystone marine species, such as great white and tiger sharks.

To track Mary Lee and Cisco, among other great whites, visit Ocearch’s website. Mary Lee also has quite a Twitter presence @MaryLeeShark with a following of 112,000 and growing.