During a recent excursion on an Australian charter boat, the raddest of discoveries was made: Sharks dig AC/DC.

The discovery came from an experiment by an Australian operator, Matt Waller, looking to lure sharks towards tourists looking to get a good look at sharks from his boat. He placed a few speakers in underwater cages and blasted “Back in Black”. The result? Sharks blissfully rubbed their snouts against the speakers.

“Sharks don’t actually have ears, and it’s the frequency and vibration they’re after,” explained Waller. He experimented with a few other genres, but got the best result from loud, low frequency, metal. Interestingly, the sharks seemed to be less aggressive and were nearly soothed into submission. This is kind of the opposite of what AC/DC should do to a person.

So now you know: next time you go swimming with sharks, make sure you make a metal playlist. Stock it with Slayer, Iron Maiden, Black Sabbath, and of course some AC/DC. It may just save your life.

Does this discovery surprise you?

[via NPR]