Whales

So imagine, you come, you swim like you have always done, then you come to this area and you hear that sound. You don’t know what it is, it could be an earthquake, it’s such a high frequency, so loud. It’s not a boat, they know boat noise, it’s disturbing but they know it. Where does it come from, what is it? And it does cover communication, the same frequency is masking the communication of some of the whales and I see that they just go. Pilot whales, for the first time this year, they came and then after two days, they just left.