5 Best Healthy Seafood Choices for a Balanced and Nutritious Diet
September 10, 20245 Best Healthy Seafood Choices for a Balanced and Nutritious Diet
Seafood is one of the most nutritionally complete food categories available — high-quality protein, omega-3 fatty acids, vitamin D, B12, iodine, selenium, and zinc, often in a single serving. The five seafood choices below represent a range of price points, flavors, and nutritional profiles, from the everyday (sardines, mussels) to the occasional luxury (king crab, caviar). Each is backed by specific nutritional data so you can make informed choices for your diet.
🔗 All Fish | 🔗 Mussels | 🔗 Caviar
Quick Comparison: Nutrition per 3 oz (85g) Cooked
| Seafood | Calories | Protein | Omega-3 (EPA+DHA) | Standout Nutrient |
|---|---|---|---|---|
| Wild salmon | ~155 | ~17g | ~1,500–2,000mg | Vitamin D (97% DV) |
| Sardines (canned in oil) | ~191 | ~23g | ~1,300–1,500mg | Calcium (35% DV), B12 (149% DV) |
| King crab | ~82 | ~16g | ~350mg | Zinc (43% DV), Selenium (56% DV) |
| Mussels | ~146 | ~20g | ~700–900mg | B12 (833% DV), Manganese (252% DV) |
| Caviar (sturgeon) | ~74 | ~7g | ~1,000–1,200mg | B12 (236% DV), Selenium (65% DV) |
1. Wild Salmon — The Gold Standard for Omega-3s
Wild salmon is the most omega-3-rich commonly consumed fish, providing 1,500–2,000mg of EPA+DHA per 3 oz serving — well above the 250–500mg per day recommended by most health authorities for general cardiovascular health. It's also one of the few dietary sources of vitamin D (97% DV per 3 oz), a nutrient that approximately 40% of Americans are deficient in. Vitamin D plays roles in bone health, immune function, muscle function, and mood regulation.
Wild vs. farmed: Wild salmon (sockeye, Chinook, coho) has a higher omega-3 to omega-6 ratio than farmed Atlantic salmon, which is fed a diet that includes more omega-6-rich vegetable oils. Both are nutritious; wild is preferable for omega-3 content and lower contaminant levels.
Mercury: Salmon is a low-mercury fish (average 0.022 ppm) — safe for daily consumption, including for pregnant women and children.
How to enjoy it: Pan-sear skin-side down in a hot cast iron skillet for 4–5 minutes; flip for 1–2 minutes; the skin becomes crispy and the flesh stays moist. Serve with roasted vegetables and lemon.
🔗 Sockeye Salmon Fillets | 🔗 Copper River King Salmon
2. Sardines — The Most Nutritionally Dense Fish Per Dollar
Sardines are arguably the most nutritionally impressive fish available — and the most underrated. Per 3 oz serving, sardines provide: 23g of protein (higher than salmon); 1,300–1,500mg of omega-3s (comparable to salmon); 35% DV of calcium (because you eat the small, soft bones — the only commonly consumed fish where you eat the bones); 149% DV of vitamin B12; significant vitamin D, selenium, and phosphorus. All of this for approximately $1–2 per serving from a can.
The bone calcium advantage: Sardines are one of the very few non-dairy sources of significant dietary calcium. The soft, edible bones in canned sardines provide calcium in a highly bioavailable form. For people who don't consume dairy, sardines are one of the best dietary calcium sources available.
Mercury: Sardines are extremely low in mercury (average 0.013 ppm) — one of the safest fish to eat frequently. Because they're small and short-lived, they accumulate very little mercury from the food chain.
How to enjoy them: On toast with Dijon mustard and sliced red onion; in pasta with capers, olives, and tomatoes; in a Mediterranean salad with white beans, lemon, and parsley. The strong flavor mellows significantly when cooked.
3. King Crab — High Protein, Exceptional Zinc and Selenium
King crab is one of the leanest high-protein seafood options: approximately 82 calories and 16g of protein per 3 oz, with less than 1g of fat. It's particularly notable for zinc (43% DV per 3 oz) and selenium (56% DV). Zinc is essential for immune function, wound healing, protein synthesis, and testosterone production; selenium is a powerful antioxidant that supports thyroid function and reduces oxidative stress. King crab is also a good source of phosphorus and copper.
Practical note: King crab is pre-cooked and frozen; you're reheating, not cooking from raw. Steam for 5–7 minutes (thawed) or 10–12 minutes (frozen). Serve with drawn butter and lemon — the simplest preparation is the best.
🔗 Alaskan Red King Crab Legs | 🔗 Golden King Crab
4. Mussels — The Most Nutritious Shellfish Per Calorie
Mussels are the most micronutrient-dense shellfish available, and one of the most nutritionally complete foods of any category. The standout numbers: vitamin B12 at 833% DV per 3 oz — one of the highest B12 concentrations of any food; manganese at 252% DV; iron at 32% DV; omega-3s at 700–900mg. B12 deficiency is one of the most common nutritional deficiencies worldwide (particularly in older adults and people who eat little animal protein), and mussels are one of the most effective dietary sources for correcting it.
Sustainability bonus: Farmed mussels are rated "Best Choice" by Monterey Bay Aquarium Seafood Watch — the most sustainable animal protein available. They require no feed, no freshwater, and actively improve water quality.
How to enjoy them: Steam in white wine with garlic and shallots for 4–6 minutes; serve with crusty bread to soak up the broth. One of the fastest, most nutritious meals you can make.
5. Caviar — The Most Nutrient-Dense Luxury Food
Caviar (sturgeon roe) is extraordinarily nutrient-dense for its calorie count: approximately 74 calories per 3 oz, with 7g of protein, 1,000–1,200mg of omega-3s, 236% DV of vitamin B12, and 65% DV of selenium. It also contains significant vitamin D, vitamin A, iron, and magnesium. Caviar is one of the few foods that provides meaningful amounts of all four fat-soluble vitamins (A, D, E, K) simultaneously.
Practical note: Caviar is typically consumed in small quantities (1–2 oz per serving) due to its intensity and price. Even at these small amounts, the nutritional contribution is significant. Serve chilled on a non-reactive surface (mother-of-pearl, bone, or plastic spoon — never metal, which imparts a metallic taste); with blinis and crème fraîche; or simply on buttered toast.
🔗 Sturgeon Black Caviar | 🔗 Red Caviar (Salmon Roe)
How to Incorporate More Seafood Into Your Diet
- Target 2–4 servings per week: The American Heart Association recommends at least 2 servings of fish per week; for optimal omega-3 intake, 3–4 servings is better
- Vary your choices: Different seafood provides different micronutrients; rotating between salmon, mussels, sardines, and shellfish maximizes nutritional diversity
- Keep canned sardines and smoked salmon on hand: The fastest, most nutritious seafood options require no cooking; canned sardines on toast or smoked salmon on a grain bowl takes 5 minutes
- Batch-cook mussels or clams: A 2 lb pot of steamed mussels takes 10 minutes and provides 2–3 servings of high-protein, high-B12 food
- Use king crab or shrimp as a protein swap: Replace chicken or beef in salads, grain bowls, and pasta with shellfish for a lower-calorie, higher-micronutrient alternative
Shop Healthy Seafood
- 🔗 Sockeye Salmon Fillets
- 🔗 Premium Mussels
- 🔗 Alaskan Red King Crab Legs
- 🔗 Sturgeon Black Caviar
- 🔗 Red Caviar
- 🔗 Dry-Aged Fish
🎥 Watch seafood cooking tutorials on the Global Seafoods YouTube Channel
FAQs: Healthy Seafood Choices
Which seafood has the most omega-3 fatty acids?
Among commonly consumed seafood, wild salmon has the highest omega-3 (EPA+DHA) content: approximately 1,500–2,000mg per 3 oz serving. Other high-omega-3 options: sardines (1,300–1,500mg per 3 oz); mackerel (1,000–1,500mg); caviar (1,000–1,200mg); mussels (700–900mg). For context, most health authorities recommend 250–500mg of EPA+DHA per day for general cardiovascular health — a single serving of salmon or sardines provides 3–6 days' worth of this recommendation. For people with elevated cardiovascular risk, the American Heart Association recommends 1,000mg per day of EPA+DHA, which can be achieved with one serving of salmon or sardines per day.
Is it safe to eat seafood every day?
For most people, eating seafood daily is safe and beneficial — with one important caveat: mercury. Mercury accumulates in fish tissue through the food chain; large, long-lived predatory fish (swordfish, shark, king mackerel, bigeye tuna, tilefish) have the highest mercury levels and should be limited to 1 serving per week or less, particularly for pregnant women, nursing mothers, and young children. Low-mercury seafood — salmon (0.022 ppm average), sardines (0.013 ppm), mussels, clams, shrimp, scallops, oysters — can be eaten daily without concern. The FDA and EPA recommend that pregnant women eat 2–3 servings per week of low-mercury seafood, specifically because the omega-3s and iodine in seafood are critical for fetal brain development.
Why are sardines considered so nutritious despite being so cheap?
Sardines are nutritionally exceptional for several reasons: (1) You eat the bones — the soft, edible bones in canned sardines provide 35% DV of calcium per 3 oz, making sardines one of the very few non-dairy sources of significant dietary calcium; (2) High omega-3 content — 1,300–1,500mg per 3 oz, comparable to salmon; (3) Highest protein of the five — 23g per 3 oz; (4) Extraordinary B12 — 149% DV per 3 oz; (5) Extremely low mercury — 0.013 ppm average, one of the safest fish to eat frequently. The reason they're cheap: sardines are small, short-lived, and extremely abundant; they reproduce quickly and don't accumulate mercury or environmental contaminants the way larger fish do. They're also easy to can, which makes them shelf-stable and globally accessible. Nutritionists and longevity researchers frequently cite sardines as one of the most underrated foods in the modern diet.