Hikers in Papua New Guinea heard an “eep-eep-eep” sound and followed it to a yellow-spotted animal. Take a look.

Researchers detected short clicking noises from rig sharks during handling in the lab, though they're not sure why or how the sound is produced ...

Clicklike noises made by a small species of shark represent the first instance of a shark actively producing sound ...

The clicking of flattened teeth, discovered by accident, could be “the first documented case of deliberate sound production in sharks,” evolutionary biologist Carolin Nieder, of Woods Hole ...

There are many famous examples of animals who seem to understand human language. But is there any real science behind them?