SardinesSardines vs. Salmon: Which Fish Actually Wins?
Here's the honest answer before the details: salmon is the omega-3 and vitamin D heavyweight — roughly double the EPA+DHA and nearly triple the vitamin D. Sardines answer with 25× the calcium, 3× the B12, less saturated fat, a fraction of the price, and none of the farmed-fish baggage. Both are FDA "Best Choice" for mercury, so this is a values-and-wallet fight, not a safety one.
The scorecard
Figures are per 100g: canned Atlantic sardines in oil (drained) vs. farmed Atlantic salmon. Winner of each row in red.
| Per 100g | Sardines | Salmon |
|---|---|---|
| Calories | 208 kcal | 206 kcal |
| Protein | 24.6 g | 22.1 g |
| Omega-3 (EPA+DHA) | ~980 mg | ~2,150 mg |
| Saturated fat | 1.5 g | 2.4 g |
| Calcium | 382 mg | 15 mg |
| Vitamin D | 4.8 mcg | 13.1 mcg |
| Vitamin B12 | 8.9 mcg | 2.8 mcg |
| Cholesterol | 142 mg | 63 mg |
| Mercury (FDA rating) | Best Choice | Best Choice |
| Price per serving | ~$1.50–4 | ~$4–12 |
Round 1 — Nutrition: two different superfoods
Salmon's oil is the story here — around 2,150mg of EPA+DHA per 100g, nearly all of it carried by a very high DHA share (roughly 1,457mg DHA, the single biggest number on the board). If your one goal is maximum omega-3 per bite, salmon takes it comfortably, and it brings almost triple the vitamin D along for the ride.
Sardines answer with something a salmon fillet structurally cannot: the whole fish. You eat the softened, fully edible bones — that's 382mg of calcium against salmon's 15mg, roughly a 25-fold gap — plus 8.9mcg of B12 (about triple salmon's) and less saturated fat. One honest nuance: canned salmon with bones narrows the calcium gap a lot (to ~240mg), but most canned salmon sold today is skinless and boneless, so read the label — the fillet numbers above are the honest default.
Round 2 — Mercury & contaminants: tied at the top
There's no winner here, and it's worth saying plainly. Sardines and salmon (especially wild Alaskan) are the two fish that every low-mercury list agrees on — both sit in the FDA/EPA "Best Choice" tier, the lowest-mercury category, safe for frequent eating including in pregnancy. On safety, pick either.
Round 3 — Farmed vs. wild: the round salmon has to fight alone
This is where the fish diverge. Sardines are, for practical purposes, all wild-caught — there's no sardine-farming industry to worry about. Most affordable salmon, by contrast, is farmed Atlantic, which comes with real debates: feed-conversion ratios, sea-lice pressure on wild stocks, and localized effluent around pens — set against genuine defenses like steadily improving practices and an omega-3 profile that holds up. Wild Alaskan salmon sidesteps most of that with well-managed fisheries, but you pay for it at the counter.
Sardines skip the entire dilemma: small, fast-growing, low on the food chain, and among the lowest-carbon animal proteins there are. They're not automatically perfect — sardine sustainability is judged stock-by-stock, as we cover in our sardine seasons and sustainability guide — but there's no farmed-vs-wild question to answer in the first place.
Round 4 — Price & practicality
The gap most guides skip. A tin of sardines is shelf-stable, needs zero cooking, and runs about $1.50–4 a serving; salmon is roughly $4–12, and fresh fillets need cooking and timing. That matters, because the standard health advice — "eat oily fish a couple of times a week" — mostly fails on cost and friction. Sardines are how that advice actually happens for most people: a tin, a fork, done.
Round 5 — Taste & kitchen
Salmon is the crowd-pleaser: mild, meaty, familiar, and it takes heat beautifully in a pan or oven. Sardines are brinier and richer, with straight-from-the-tin convenience salmon can't match. If you love salmon but are wary of sardines, start with a mild oil-packed skinless & boneless tin — it's the gentlest on-ramp before working up to a bones-in classic.
The verdict
Choose salmon for maximum omega-3 and vitamin D per bite, and for dinners that please a table. Choose sardines for calcium and B12, for price, for sustainability simplicity, and for zero-prep weekday consistency. For most people the real answer isn't either/or — it's salmon once a week, sardines two or three times. See where the best tins land in our full sardine ranking, and how often is sensible in our sardinemaxxing fact-check.
Sources
- USDA-sourced nutrition comparison via Foodstruct — canned Atlantic sardines in oil vs. farmed Atlantic salmon, per 100g
- FDA/EPA — Advice About Eating Fish (sardines and salmon both rated "Best Choice" for mercury)
- Monterey Bay Aquarium Seafood Watch — farmed vs. wild salmon sustainability ratings
- Sardines.World — sardine seasons & sustainability guide (stock-by-stock caveat)
Frequently asked questions
Which is healthier, sardines or salmon?
Neither wins outright: salmon has ~2× the omega-3 and ~3× the vitamin D; sardines have ~25× the calcium, ~3× the B12, less saturated fat and far lower cost. Both are FDA "Best Choice" for mercury.
Do sardines have more calcium than salmon?
Dramatically: ~382mg vs ~15mg per 100g, because canned sardines' softened bones are eaten. Canned salmon with bones narrows the gap (~240mg), but most canned salmon now sold is boneless.
Is salmon or sardines better for omega-3?
Salmon, roughly double per 100g (~2,150mg vs ~980mg EPA+DHA), with an especially high DHA share.
Are sardines or salmon lower in mercury?
Both sit in the FDA/EPA "Best Choice" lowest-mercury tier; treat them as equally safe for regular eating, including in pregnancy.
Is farmed salmon bad compared to sardines?
Farmed Atlantic salmon carries real but manageable environmental concerns; sardines are wild-caught, low-trophic and among the lowest-impact animal proteins, so on sustainability sardines win by default.