what your going to hear over and over again is "fishing is the problem"
(I don't eat sealife or seafood however you wanna call it but I'm not vegan nor vegetarian) People say this isn't pro vegan propaganda but it is. if fishing is the problem, then to stop fishing people would need to stop eating them along with the other stuff it is used for. So the film is basically saying over and over again is stop eating fish, not directly to the audience but still understandable to the viewer.