Healthiest Fish for Weight Loss

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Fish is one of the most effective foods for weight loss. It is high in protein — which keeps you full and preserves muscle mass during a calorie deficit — and generally lower in calories than other animal proteins. But some fish are significantly better for weight loss than others. This guide ranks the best options and explains why.

This is part of our Fish Nutrition Complete Guide. See also Fish with the Most Protein and Fish vs Chicken.

What Makes a Fish Good for Weight Loss?

Three factors determine how useful a fish is for weight loss:

Protein content — high protein increases satiety and preserves lean muscle during calorie restriction. Foods high in protein also have a higher thermic effect, meaning the body burns more calories digesting them.

Calories per serving — lower calorie fish allow larger, more satisfying portions within a calorie budget.

Protein-to-calorie ratio — the most useful metric for weight loss. A fish that provides 25g of protein for 100 calories is more valuable than one that provides 20g of protein for 200 calories.

Best Fish for Weight Loss — Ranked

1. Shrimp — ~99 calories, 24g protein per 100g
Shrimp tops the list for weight loss due to its extraordinary protein-to-calorie ratio. Almost all of its calories come from protein with virtually no fat. A generous 200g serving provides 48g of protein for just 198 calories — exceptional value. The only consideration is its relatively high cholesterol content, though this is not a concern for most people.

2. Cod — ~105 calories, 23g protein per 100g
Cod is the leanest of the true white fish and one of the lowest-calorie protein sources available. Its mild flavour makes it versatile and easy to prepare in a variety of ways that keep it interesting as a regular meal staple during weight loss.

3. Halibut — ~111 calories, 23g protein per 100g
Halibut sits just above cod in calories while matching it on protein. It has a firmer, meatier texture than cod which many people find more satisfying, and it provides a broader range of micronutrients including selenium and magnesium.

4. Tilapia — ~128 calories, 26g protein per 100g
Tilapia actually leads all fish on raw protein content per 100g despite being very low in calories. It is affordable, widely available, and has a neutral flavour that works with almost any seasoning or sauce. An excellent everyday weight loss protein.

5. Tuna — ~144 calories, 23g protein per 100g
Tuna is slightly higher in calories than the above options but still an excellent weight loss choice, particularly canned tuna which is one of the most convenient and affordable high-protein foods available.

6. Salmon — ~208 calories, 20g protein per 100g
Salmon is higher in calories due to its fat content, but it remains valuable for weight loss because its omega-3 fatty acids support fat metabolism and its high protein content promotes satiety. The calorie cost is worth paying for the nutritional benefits — just be mindful of portion size.

Tips for Cooking Fish During Weight Loss

How you prepare fish matters as much as which fish you choose. Grilling, baking, steaming, and poaching add minimal calories. Frying — particularly deep frying in batter — can more than double the calorie content of a fish serving. A grilled cod fillet at 105 calories per 100g becomes a very different proposition as battered fish at 250+ calories per 100g.

Avoid heavy cream sauces and butter-based preparations if you are in a calorie deficit. Lemon, herbs, garlic, and light marinades add flavour without meaningful calories.

Use our Daily Calorie Needs Calculator to find your weight loss calorie target and our Food Tracker to log your meals and stay on track.

| weight loss | nutrition | fish


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