porpoise

Hello, If anyone here has dove with dolphins, porpoises, or whales using a hookah system, does the noise and vibrations from the systems bother them or are they unaffected by the noises and vibrations? Thanks

Video at Great Island 18 Sept 2016 while I was kayaking. It looks like a shark did this. Anyone disagree? I'm not sure if the porpoise was living or dead at the time. The problem is that only part of the porpoise is missing--it was not entirely eaten. Maybe it was dead, maybe other porpoises...