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European smelt
European smelt (Osmerus eperlanus), A short-lived spring fish that smells of cucumber; nothing to limit.. The national eating advice, why it applies, the rules that matter when you catch it, and what the kitchen changes about the numbers.
Where it lives
Smelt spends most of the year in the sea or in a large lake and runs into river mouths and shallow bays to spawn in early spring, often while there is still ice around. That run is a genuine seasonal event on the Narva, on Peipsi and around the eastern Gulf of Finland, and it is fished with fine nets and traps for the few weeks it lasts. Saint Petersburg holds a festival for it; Estonian and Finnish river mouths simply fill with people.
Why the advice says what it says
The famous thing about a fresh smelt is that it smells strongly and unmistakably of cut cucumber. That is real, it is a property of the fresh fish, and it is the traditional test of freshness for it — the cucumber note fades as the fish ages. Nutritionally and toxicologically smelt is a straightforward case: a small fish, living only a few years, feeding on plankton and small invertebrates, taken in a short spring window. There is no accumulation story, no national advisory, and no size rule to worry about. It is one of the small whole fish that this region has always eaten in quantity for a few weeks and then not thought about again until the following spring.
The advice
| Who it applies to | What the advice says | Where it comes from |
|---|---|---|
| Everyone | No frequency restriction. Short-lived and low in the food chain. | Absence from national advisories; reasoning from the life history above |
| Anyone buying it | Fresh smelt smells of cucumber. If it does not, it is not fresh. | Traditional and widely documented freshness test for the species |
The rules
What the rule book says about this fish, described by instrument rather than printed as a number:
- The spring run is fished under seasonal gear rules; net and trap fishing in river mouths is permitted only in the defined window and only with the right permit.
- Some river mouths are closed to protect other species running at the same time.
- Because the fishery is concentrated into a few weeks and a few hundred metres of water, local restrictions are common and are posted locally.
In the kitchen
Floured and fried whole in a hot pan, eaten head, bones and all, in quantity, standing up, usually within sight of where it was caught. Larger smelt are sometimes gutted first; small ones are not. Like vendace, eating the whole fish is what makes it a calcium source.
This is a reference page, not a fishing licence and not medical advice. Minimum sizes, closed seasons, bag limits and licence prices are set per country and per water body and change most years, so no number for them is printed here — each species page says which instrument sets the rule and where to look up the figure for the water you are standing on. If a clinician has given you a fish frequency or a contaminant instruction, that instruction outranks anything on this page.
Nutrition figures
| Per 100 g, raw | Amount |
|---|---|
| Energy | 97 kcal |
| Protein | 17.6 g |
| Fat | 2.4 g |
| Carbohydrate | 0 g |
| Fibre | 0 g |
| Salt | 0.2 g |
| Published row | Rainbow smelt, raw |
Related published rows:
- Rainbow smelt, cooked — 124 kcal per 100 g
Typical round weight for the calculator: 15–60 g.
Eating advice: Finnish Food Authority and Swedish Food Agency national advice on Baltic and inland fish. Contaminant ceilings and the Baltic derogation: Regulation (EU) 2023/915; weekly tolerable intakes: EFSA methylmercury (2012) and dioxins/dioxin-like PCBs (2018). Nutrition figures: USDA FoodData Central rows published on this site. Checked 2026-09-06.
Frequently asked questions
Why does smelt smell of cucumber?
It is a genuine property of the fresh fish, produced by volatile compounds in its flesh, and it is strongest in the first hours after the catch. Fishmongers and fishermen use it as the freshness test: a fresh smelt smells of cucumber, an old one smells of fish.
Fish in the same advice group
Whitefish
Moderately oily but low in the food chain; no frequency advisory.
Vendace
Small, short-lived and plankton-feeding — about as low-risk as fish gets here.
Rainbow trout (farmed)
Farmed on controlled feed and harvested young — the oily fish with no advisory attached.
All species compared
The full table, grouped the way the advice groups it.
Eat the fish, log the fish
TempoLife tracks what you actually ate against the same food data linked on this page, so a fish meal shows up in your omega-3, vitamin D and salt totals without a second thought.