Yep. Its fucked. Literally drives whales to beach themselves.

https://en.m.wikipedia.org/wiki/Marine_mammals_and_sonar

Like 10,000 dolphins were killed in the black sea in 2022 because of sonar.

There's two types of military SONAR: active and passive. Active SONAR is using pings and listening for the echo, but it's not very commonly used by submarines. Passive sonar is just listening out for engine noise from ships and prop noise from other submarines. Warships use active SONAR more because they're already noisy and so if they think an enemy submarine is in the area they'll use it to try and locate, but in peacetime it's mostly reserved for training exercises. It's still terrible for wildlife, even if they don't die it's very distressing and disorientating but it's not constantly scanning like a RADAR.

But that means that a person would be killed even if they are miles away? Maybe tens of miles.

Found it: Based on sonar guidelines and studies on sound propagation, a diver exposed to 235 dB low-frequency sonar would likely need to be more than 1.5–2 kilometers (1–1.2 miles) away to ensure safety.

However, pings are conical and the strongest sonar is at the bow. So you could literally be safe if you were diving behind it.

Every 10dB is twice as much energy, so 235 dB is pretty scary.

https://en.m.wikipedia.org/wiki/Marine_mammals_and_sonar

That's what I want to know now as well!

Well now I don't know what to believe

Not exactly, navy sonar has history of kills, but I haven't heard of something shattering into pink mess by that. Though military stuffs aren't always public.

It was fun to read though. But I believed it until I checked.