I love the taste of salmon. It's one of the few healthy things I eat. However, I could watch this without wanting to go buy some salmon to eat.
Salmon swim in lots of different waters, but they only breed in the wild in certain specific streams. Well, humans damned those streams up and then were surprised that the salmon weren't reproducing. This doc speaks about all that goes on in trying to address the matter.
It turns out that we've been putting fish in hatcheries for decades. Still, the fish need help getting back to the ocean. Farm-raised fish eat near the surface, so bird easily scoop them up when released. The turbines in the damns often dice them up. Sea lions cash in on humans dumping salmon at a certain point in the same predictable spots. Further, the disappearance of salmon may violate many Native American treaties.
They show a pair of salmon breeding. I wasn't expecting them to "do the nasty." However, those who think all animals breed like in "March of the Penguins" will be in for a surprise. When the fish were releasing eggs and male-goo, they did have their mouths open and I wonder if it felt orgasmic to them. The documentary never answers why salmon die after breeding. I also would like to know if some of them avoid breeding just to stay alive. (Did the two breeding fish get male-goo in their mouths?!?)
This seemed like a straw man argument. If factor X caused the problem, then it's obvious that getting rid of factor X would be the solution. The work tries to end on a positive note. It has an environmental message similar to "Avatar" and "The Lion King." The fish eat bugs and then they are eaten by larger animals and then the bugs dine on their leftover corpses and bones.
The work also raises concerns about biodiversity. One interviewee states, "We used to have Bach, Beethoven, and Handl and now we have Yanni, Yanni, and Yanni." This work is full of catchy quotes like that.