But just how did a dish of fermented Baltic Sea herring come to be to start with? The background of surströmming is fascinating. Just how long Swedish people have been consuming surströmming is unclear, but you'll find data on the fermented Baltic sea Herring getting consumed in the 16th Century, https://surstrmming80246.creacionblog.com/28791466/the-2-minute-rule-for-what-happens-when-thai-people-meet-surströmming