But a surprising number of sounds have been recorded that defy explanation. Here are some of the most mysterious.

In the murky depths of the ocean, one predator has a trait that exacerbates the dread it inspires as it slides through the ocean waves.

The clicking behaviour has been described in the new study as the first documented case of a shark deliberately making sound ...

Sound waves travel through different types of matter, including liquid water. Importantly, the movement of ocean water can ...

Yes, we make sounds (active sonar) to study the ocean as well. Andrew DeVogelaere, research coordinator at Monterey Bay ...

To Fish, it was clear that ocean creatures were far noisier than anyone had guessed. Sound waves travel through water efficiently—five times faster than through air—but, as Fish hastened to ...

Teeming with life, a healthy coral reef is one of the noisiest places in the ocean. Recorded using underwater microphones, this cacophony can sound to our ears remarkably like frying bacon. Listen for ...