Two great white sharks seem to be following each other all the way from the southeast U.S. to Canada. Great white sharks (Carcharodon carcharias) are usually solitary animals and travel vast distances alone. So the pair's 4,000-mile (6,400 kilometers) swim together has left scientists puzzled.
"White sharks lead a very solitary existence," Robert Hueter, a shark scientist at the nonprofit organization OCEARCH that tagged the pair, said in a video posted to Facebook. "We don't really expect to see these white sharks staying together."
