Val my wife has a salad dish where she uses fermented raw fish....It's actually cut up fish placed in a jar with special sources and other goodies. Takes about 1 - 2 years to get good and tasty (matured) for her. If you ever smelt it before it was cooked you would swear to god that someone had a flyblown rancid fish sitting in the kitchen. But it is a delicacy in Thailand even though most foreigners would run a mile from the smell.
Talking about fishes, actually in the second episode that I watched, they were talking about these native Indians in Alaska, they'd take these salmon heads, dig a hole in the ground, then put the heads in the hole with some salmon eggs to marinate, then cover back the hole with mud. It will be ready to eat in 2 weeks, but it's all rotten and they eat it raw without cooking it too.
Also it is a dangerous process because if they cover the hole with too much mud, then there won't be enough air for them to breath and the heads will become uneatable, but this they will only find out after they eat it and get really sick, people actually die from this.
This is a traditional food for them.
They did mentioned one thing in the show though and it's true, throughout human history, humans love fermented food, wine, beer, cheese, etc, are all fermented food.
But these native Indians, damn they're eating rotten meat, another family that they showed on the show, they were cooking these seals paws that has been rotten for like a month or something...