Kiviak (Greenland)

Kiviak is the most biologically daring fermentation on Earth. Up to 500 small seabirds are packed into a hollowed-out seal carcass, sealed with fat, and buried for 3–18 months, achieving a protein density 40% higher than typical fermented fish through anaerobic breakdown. This paste-like delicacy is consumed raw on special occasions, with a botulism risk significantly greater than #8's century eggs. Outperforming #10 in sheer microbial hazard, Kiviak's 30% fat content from seal blubber delivers a rancid, cheesy flavor that even experts find unforgettable.