For centuries, sharks have patrolled the oceans as silent phantoms—seen, feared, but never heard. But in a small tank in New Zealand, one of them clicked. The spotted estuary smoothhound, or “rig shark”,

Researchers in New Zealand have recorded what they believe is the first instance of a shark actively making noise.

Sharks are thought of as silent killers, associated with no other sound but the "duunnn dunn, duuuunnnn dunn" of the Jaws theme song. But humans might have been long ignorant of the sound sharks truly make,