These majestic sharks gather in their hundreds at huge volcanic seamounts that project out of the seabed. They come here to be cleaned and to find a mate, circling the seamount in a sort of ...

Peter Klimley is a man who has held his breath and dived down 100 feet to hand-tag hammerhead sharks with a dart gun ... Klimley has studied scalloped hammerheads at an underwater mountain ...

And in 2014, the scalloped ... sharks spent 90 percent of their swimming time tilted to one side—usually at an angle of 50 to ...