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Fish and seafood from USA
Stinky eggs are salmon roe left to age in a moss-lined pit, a barrel in the ground or a seal- or fish-skin bag until they turn pungent; aged long enough they form a firm-skinned "cheese". The Alaska guide calls this aging putrefaction rather than fermentation, which needs a carbohydrate substrate, and salmon eggs are the fish most often behind botulism in Alaska.
| Salmon eggs (roe) | [ak-guide] |
| Moss or grass to line the pit, or a seal-skin or fish-skin bag (poke) | [ak-guide] |
Total time across the recorded steps: 10 min
What changes: The roe is taken from freshly caught salmon
Microbes at work in this step
Not documented for this step.
Measured measured in a studySet fixed by a specification or tested recipeReported one source reports itTypical a general value, not sourced for this fermentUnconfirmed not yet checked against a source
Stinky eggs are salmon roe left to age in a moss-lined pit, a barrel in the ground or a seal- or fish-skin bag until they turn pungent; aged long enough they form a firm-skinned "cheese". The Alaska guide calls this aging putrefaction rather than fermentation, which needs a carbohydrate substrate, and salmon eggs are the fish most often behind botulism in Alaska. Made in 4 steps over 10 min. The longest step, boil before eating, takes 10 min (CDC 2026).
| Main step | 10 minReported[cdc-prev] | Boil before eating |
|---|---|---|
| Temperature | up to 2 °CReported[ak-guide] | Age until pungent; aged in a poke, the eggs dry into a "cheese" |
Stink eggs are putrefied, not fermented, because, as the Alaska guide says, fermentation needs a carbohydrate substrate and makes acid, while this aging leaves the pH neutral and does not hold back Clostridium botulinum type E. The Alaska guide advises cold aging below 2 °C, traditional methods and cooking, and says traditional methods will not always prevent toxin.
This page records a practice; it is not a recipe to follow. The Alaska guide says this aging is putrefaction, which does not hold back botulism, and that traditional preparation will not always prevent toxin. Salmon eggs are the fish most often implicated in Alaska botulism (27 of 141 confirmed outbreaks, 1950–2010), and type E caused 83% of all Alaska outbreaks. In British Columbia, fermented salmon eggs caused 8 of 9 type E outbreaks in First Nations communities from 1985 to 2005. Sealed containers and warm aging raise the risk. For people who keep this tradition, the state guidance is to use traditional methods, age at below 2 °C and cook the food; CDC advises boiling home-fermented Alaska Native foods for 10 minutes before eating. Boiling is no guarantee, because the FDA says not to rely on heat as the control. CDC says the toxin cannot be seen, smelled or tasted, and that even a small taste can be deadly.
Hazards the sources name: Clostridium botulinum type E (salmon eggs were implicated in 27 of 141 confirmed Alaska outbreaks, 1950–2010, and in 8 of 9 type E outbreaks in British Columbia First Nations communities, 1985–2005).
Every number is labelled with how it is known. How this atlas is made
Edward Nelson, who visited the coastal villages of north-west Alaska in 1877–1881, described king salmon heads aged in small turf-covered pits between the Yukon and Kuskokwim rivers; the Alaska guide quotes this for stink heads, the companion food of stink eggs. A 1987 survey in four Bristol Bay Yup'ik villages found aged foods prepared regularly by 80% of grandparents, 71% of parents and 15% of high school students; for fish heads, only 13% of preparers still used the traditional clay pit.
