Fish is one of the best natural protein sources you can add to your diet. Whether your goal is weight loss, muscle gain, or clean eating, high-protein fish provides essential nutrients with relatively low calories.

But not all fish are equal.

Some fish contain lean protein with almost no fat, while others provide healthy omega-3 fats along with protein.

In this guide, we will compare some of the highest protein fish per 100g, including cod, salmon, tuna, and shrimp. You’ll learn:

• Which fish has the most protein per calorie
• The best fish for weight loss
• The healthiest fish for muscle building
• How to choose the best lean protein fish

Why Fish Is One of the Best High-Protein Foods

Fish is widely recommended by nutritionists because it delivers high-quality complete protein along with important micronutrients.

Here are some reasons fish is considered one of the healthiest protein sources:

• Contains complete protein with all essential amino acids
• Rich in omega-3 fatty acids
• Generally lower in saturated fat than red meat
• Supports heart health and brain function
• Excellent for high-protein diets and weight management

Many athletes and diet programs rely on fish because it provides lean protein without excessive calories.

Protein Content of Popular Fish (Per 100g)

Below is a comparison of four popular high-protein seafood options.

Each of these seafood options provides excellent protein density, but they differ significantly in calories and fat.

Cod: One of the Best Lean Protein Fish

Cod is often recommended for weight loss diets and low-fat meal plans.

Nutrition per 100g:

• 82 calories
• 18g protein
• 1g fat

Because cod contains very little fat, it provides one of the highest protein-to-calorie ratios among fish.

Benefits of Cod

• Ideal for low-calorie high-protein diets
• Very lean and easy to digest
• Mild flavor that works in many recipes
• Good source of vitamin B12 and selenium

Cod is often used in cutting diets and bodybuilding meal plans.

Salmon: High Protein with Healthy Omega-3

Salmon is slightly higher in calories because it contains healthy fats, but it remains one of the most nutritious fish you can eat.

Nutrition per 100g:

• 182 calories
• 25g protein
• 9g fat

The fats in salmon are mostly omega-3 fatty acids, which support:

• Heart health
• Brain function
• Reduced inflammation

Why Salmon Is One of the Healthiest Fish

Salmon is considered a superfood in many diets because it combines:

• High protein
• Healthy fats
• Essential vitamins

It’s perfect for people who want protein plus long-lasting satiety.

Tuna: One of the Highest Protein Fish

Tuna is extremely popular among athletes because it delivers very high protein with minimal fat.

Nutrition per 100g:

• 125 calories
• 24g protein
• 1g fat

This makes tuna one of the best high-protein low-fat foods available.

Benefits of Tuna

• High protein for muscle growth
• Very low fat
• Convenient and affordable
• Ideal for high-protein meal prep

Many bodybuilders consider tuna one of the best protein foods for cutting phases.

Shrimp: Lean Seafood with Excellent Protein

Shrimp is another excellent option if you want high protein and very low calories.

Nutrition per 100g:

• 99 calories
• 21g protein
• 1g fat

Shrimp is especially popular in low-carb and keto diets.

Why Shrimp Is a Great Protein Source

Shrimp provides:

• Lean protein
• Selenium and iodine
• Vitamin B12
• Antioxidants like astaxanthin

It’s a great choice for light meals with high protein density.

Which Fish Has the Most Protein?

If we compare these fish per 100g:

• Salmon: 25g protein
• Tuna: 24g protein
• Shrimp: 21g protein
• Cod: 18g protein

So technically salmon has the most protein, but tuna offers a better protein-to-fat ratio.

Best Fish for Weight Loss

If your goal is fat loss, the best fish options are:

1. Cod

Very low calories and fat.

2. Tuna

Extremely high protein with minimal fat.

3. Shrimp

High protein and very low calorie density.

These fish help you stay full longer while maintaining a calorie deficit.

Best Fish for Muscle Building

For muscle growth, prioritize fish with high protein and healthy fats.

Top options include:

• Salmon
• Tuna
• Cod

Salmon is especially beneficial because omega-3 fats may support muscle recovery and reduce inflammation.

Tips for Choosing Healthy Fish

To get the most benefits from seafood, follow these tips:

1. Choose wild-caught when possible
Wild fish often contain more nutrients.

2. Avoid deep frying
Grilling, baking, or steaming preserves nutrition.

3. Rotate different fish types
This helps balance nutrients and avoid excessive mercury intake.

4. Pair with vegetables
Combining fish with fiber improves satiety.

FAQ: High Protein Fish

Which fish has the highest protein per 100g?

Salmon and tuna are among the fish with the highest protein content per 100g, typically providing 24–25 grams of protein.

What is the leanest fish with the most protein?

Cod and tuna are considered lean fish with high protein because they contain very little fat while delivering significant protein.

Is salmon better than tuna for protein?

Salmon contains slightly more protein, but tuna has less fat and fewer calories. Both are excellent protein sources.

Is shrimp a good protein source?

Yes. Shrimp is a low-calorie, high-protein seafood that provides about 21 grams of protein per 100g.

What fish is best for weight loss?

The best fish for weight loss include:

• Cod
• Tuna
• Shrimp

These fish provide high protein with low calories, helping maintain satiety.

Final Thoughts

Fish is one of the best high-protein foods you can include in a healthy diet. Options like cod, salmon, tuna, and shrimp deliver:

• High-quality protein
• Essential nutrients
• Healthy fats

Whether you want to lose weight, build muscle, or simply eat healthier, adding fish to your meals is a simple and effective strategy.