Shark DNA in the Water? Cue Music from Jaws

Sharks aren’t any more interested in hunting people than they’ve ever been, but they may be cruising our coasts in larger numbers, raising the odds, however slightly, that sharks may attack surfers, ocean swimmers, and beachgoers. Nearby sharks can be tracked, offering the public some security. For example, sharks can be followed visually or tagged in various ways. And now an even better technique may become available: an environmental DNA (eDNA) assay.The eDNA assay emerged from a s