I agree, that was real. The guy should have kicked the salmon back.
One other point I forgot to mention with dogs & salmon is salmon poisoning. When salmon enter freshwater they pick up a bacteria. When a dog that is not immune to salmon poisoning eats or licks carcasses they can become fatally ill. Simple anti-biotic treatment cures the dog & he is then immune. There is a vaccine but I was told by a vet that a better treatment was to let the dog get sick and then treat it, as the vaccine is not a sure thing.