Wild and farmed salmon are both high-quality protein foods. In a like-for-like Atlantic salmon comparison, the clearest difference is total fat, not protein.
Raw Atlantic salmon per 100 g
| Wild | Farmed | |
|---|---|---|
| Calories | 142 | 208 |
| Protein | 19.8 g | 20.4 g |
| Fat | 6.3 g | 13.4 g |
| Saturated fat | ~1.0 g | ~3.1 g |
Farmed salmon contains more than twice the fat and about 66 extra calories per 100 g, while protein differs by less than 1 g.
What about omega-3?
Farmed salmon does not automatically contain less omega-3. In these legacy references it contains more EPA and similar DHA per 100 g, partly because the fish has more total fat. Modern feed composition can change the fatty-acid profile substantially.
Species matters as much as production system
Wild sockeye, coho, chinook and Atlantic salmon are not interchangeable nutrition records. A broad claim such as “wild salmon has X calories” can hide major species differences.
Origin does not let you predict the entire nutrition profile
Differences between wild and farmed salmon depend on species, feed, fat content, season and the specific product. A reference table can show broad tendencies—such as higher total fat in many farmed salmon—but it does not make every “wild” fillet nutritionally identical to every other one.
The practical choice can also include price, availability, sustainability and taste. Nutritionally, both remain valuable sources of protein and omega-3 fats.
A 150 g serving
The reference math gives roughly 213 calories and 29.8 g protein for wild Atlantic versus 312 calories and 30.6 g protein for farmed.
Sustainability, contaminants, price and environmental footprint are separate questions. Nutritionally, both provide substantial protein and long-chain omega-3; fat and calories are the biggest consistent contrast in this particular comparison.
Why the answer changes from one salmon to another
Wild versus farmed is not a single-species comparison. Wild sockeye, coho, chinook, pink, and chum salmon differ from one another, while farmed salmon is often Atlantic salmon raised on formulated feed. Comparing one wild species with farmed Atlantic salmon can therefore mix the effects of species, habitat, feed, season, and fatness. A database pair is useful for illustrating direction, but it should not be turned into a rule for every salmon sold at a seafood counter.
Fat content is one of the clearest reasons calorie values diverge. Farmed Atlantic salmon commonly carries more total fat, so a 100-gram portion can contain considerably more energy even when protein is almost identical. That extra fat can also increase the absolute amount of omega-3 in some samples. At the same time, the ratio of omega-3 to omega-6 can shift with feed composition, which has changed over the years as aquaculture diets have evolved.
Cooking narrows or widens differences depending on water loss and added ingredients. A dry-cooked fillet loses water and becomes more nutrient-dense per 100 grams than its raw state. Oil, butter, glaze, or a sugary sauce can then add calories that have nothing to do with whether the fish was wild or farmed. If you are comparing two products for your own meal, use labels or nutrition information for the cooked preparation when available rather than relying only on raw reference values.
Environmental and contaminant questions are separate from the basic nutrition table. Farming practices, fisheries management, origin, certification, and contaminant profiles vary by region and producer. Those issues matter to many shoppers, but the words wild and farmed alone do not answer all of them. Country or region of origin, species, production method, and credible sustainability information provide a more complete picture than a single marketing descriptor.
For everyday nutrition, both types can be strong choices because both supply high-quality protein and long-chain omega-3 fats. If you prefer leaner fish, some wild salmon will fit that preference; if you value a richer texture, farmed Atlantic salmon often provides it. The most accurate comparison is specific: identify the species and product, then look at the actual fat, calories, omega-3 information when available, price, and cooking qualities that matter to you.
Price can vary as much as nutrition. Wild salmon may command a premium in some seasons, while farmed Atlantic salmon is often available year-round at a more stable cost. If budget determines frequency, choosing a farmed product you can afford regularly may be more useful than buying a more expensive wild fillet rarely. The nutrition comparison should support realistic eating patterns, not ignore them.
Sources
- USDA-derived data — Atlantic salmon, wild, raw — 142 calories, 19.84 g protein and 6.34 g fat/100 g.
- USDA-derived data — Atlantic salmon, farmed, raw — 208 calories, 20.42 g protein, 13.42 g fat and EPA/DHA values/100 g.