Mary Lee, a sixteen-foot, 3,456 pound great white shark tagged by the non-profit organization ocean research group OCEARCH in September near Cape Cod, Mass. has registered a steady number of "pings" as she moves up the eastern seaboard.
Each time a shark the research group has tagged breaks the surface, a Global Positioning System attached to the dorsal fin marks the location. That information is then made visible and mapped on the group's website for the public to track.
Mary Lee's last check-in was east of Ocean City, N.J.
Genie, another shark that was tagged near Cape Cod around the same time as Mary Lee, hasn't pinged OCEARCH's Global Shark Tracking system since Jan. 19 when her location was off the coast of South Carolina, east of Hilton Head Island.