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Seafood Tier List
Protein quality, omega-3s, and micronutrients per 100 calories. The ocean’s finest hour, with a mercury footnote where it matters.

Sockeye Salmon
72The EPA+DHA heavyweight — wild sockeye tops farmed Atlantic on omega-3s per gram.

Tuna (Canned in Water)
69A protein-per-calorie monster. The mercury is the asterisk.

Salmon (Atlantic)
68The omega-3 benchmark everything else is measured against.

Swordfish
67Steak-like fish with serious protein density.

Shrimp
6424g protein for 99 calories. The cholesterol number looks scary; dietary cholesterol matters less than you think.

Sardines
63Bones, skin, omega-3s, B12 — the whole fish is the supplement.

Cod (Atlantic)
62Nearly pure protein — the fish equivalent of chicken breast.

Halibut (Atlantic)
61The steak of white fish — meaty, lean, selenium-rich.

Octopus
60A lean protein bomb — 15g+ protein per 100g with almost no fat.

Clams
58Iron and B12 levels that embarrass red meat — the ocean's multivitamin.

Crab (Blue)
58Sweet, lean, and a selenium sleeper.

Mackerel (Atlantic)
58Sardines' bigger, oilier cousin — B12 and D for days.

Trout (Rainbow)
58Salmon nutrition at a lower price point.

Mussels
56B12 and iron levels that embarrass most red meat.

Tilapia
56The affordable white fish — inoffensive in every direction.

Red Snapper
55The Gulf's headliner. 20g protein, barely any fat, and a vitamin D surprise.

Scallops
55Sweet, seared, and nearly pure protein.

Oysters
54Zinc content is cartoonish — triple the daily value per 100g.

Herring (Atlantic)
52Sardine's bigger, oilier cousin with a serious B12 flex.

Lobster
51The luxury crustacean that's secretly lean.

Anchovies
50Pizza's favorite controversy, in fish form. Absurd protein for the size.

Catfish (Channel)
50Southern staple with a real vitamin D number.

Calamari (Squid)
48Rubber bands you can eat. Lean protein hiding in a tentacled package.

Crawfish
48Mudbug. All the fun of lobster at a fraction of the ceremony.

Mahi-Mahi
47Dolphinfish, not the mammal. The leanest crowd-pleaser in the case.

Alaska Pollock
42The fish stick's origin story. Surprisingly decent micros for the price.

Flounder
42The mildest fish here. Training wheels for seafood skeptics.

Unagi (Freshwater Eel)
34The sushi-bar showoff. Rich, fatty, and worth every calorie.
Questions
How are seafood scored?
Every food is scored 0–100 per 100 calories across five factors (protein, fiber, micronutrients and more depending on the category), combined with fixed weights, then ranked. The top 10% of the board earn S tier. Full methodology.
What is the healthiest seafood?
By our numbers: Sockeye Salmon — S tier, 72/100. See its full breakdown.