Why Package Barramundi Differs From Generic Sea Bass

Barramundi (*Lates calcarifer*, also called Asian sea bass) is most commonly sold in grocery stores as individually frozen aquaculture fillets, such as The Better Fish brand. A standard 4 oz (113g) raw package fillet contains 100 calories, 20g protein, and 2g total fat (equivalent to 88.5 kcal, 17.7g protein, and 1.77g fat per 100g raw) [1][2].

When shoppers look up generic 'sea bass' in standard nutrition databases, they often encounter European branzino (97 kcal/100g) or Chilean sea bass (146 kcal/100g) — leading to mismatched calorie and fat counts. This calculator includes both the exact Farmed Package Standard and Use My Package Label (Raw → Cooked) mode so your macros match your bag.

How Cooking Changes Barramundi Weight and Nutrients

When you bake, air-fry, or grill a 113g (4 oz) raw barramundi fillet, it loses approximately 22% of its moisture weight as steam, finishing at roughly 88g (3.1 oz) cooked [3]. Because evaporated water contains zero calories and zero protein, the whole cooked fillet retains 96 kcal and 19.6g protein (98% protein retention).

However, if you weigh your fish after cooking, the nutrient density per 100g increases because those same nutrients are now concentrated into a lighter piece of fish: 100g of baked barramundi provides 109 kcal and 22.2g protein compared to 88.5 kcal and 17.7g protein per 100g raw.

Omega-3 and Micronutrient Retention When Cooked

Farmed barramundi provides 650mg of omega-3 fatty acids per 4 oz (113g) raw fillet (~580mg per 100g) alongside 36mcg selenium (65% DV) and 4.7mcg vitamin D [1][2].

According to the USDA Table of Nutrient Retention Factors (Release 6), gentle dry-heat methods like baking or air-frying retain 95% of omega-3 fats and selenium, whereas high-heat broiling or boiling can reduce heat-sensitive B vitamins (thiamine and folate) by 15% to 30% [3].

Barramundi Nutrition: Raw Package vs. Cooked Preparations

Preparation / PortionWeightCaloriesProteinTotal FatOmega-3Selenium
1 Raw Fillet (Package / The Better Fish)113g (4 oz)100 kcal20.0g2.0g0.65g36.0mcg
1 Baked Fillet (Cooked from 4 oz Raw)88g (3.1 oz)96 kcal19.6g1.9g0.60g34.2mcg
Farmed Barramundi (Per 100g Raw)100g88.5 kcal17.7g1.8g0.58g31.9mcg
Baked Barramundi (Per 100g Cooked)100g109 kcal22.2g2.2g0.68g38.8mcg
Pan-Seared in 1 tsp Olive Oil (Per 100g Cooked)100g146 kcal22.0g6.1g0.68g38.4mcg

Practical Tips for Barramundi

  • 1

    If you eat one pre-portioned 4 oz (113g) raw fillet from the package, log 113g Raw (100 kcal, 20g protein) or 88g Baked (96 kcal, 19.6g protein).

  • 2

    Have a custom brand package label? Use our Cooking Nutrition Calculator (/tools/cooking-nutrition-calculator/) to enter any custom package label and calculate cooked retention.

  • 3

    Baking, steaming, or air-frying barramundi without added oil keeps the fillet at 96–100 calories while retaining 98% of its protein.

  • 4

    Pan-searing with 1 teaspoon of olive oil adds ~40 calories and 4.5g of heart-healthy monounsaturated fat to your fillet.

Frequently Asked Questions — Barramundi

How many calories are in a 4 oz barramundi fillet?
A standard 4 oz (113g) raw farmed barramundi fillet (such as The Better Fish brand) has 100 calories, 20g protein, 2g fat, and 0g carbohydrates. When baked without oil, that same fillet weighs ~88g (3.1 oz) and contains 96 calories and 19.6g protein.
How does cooking change barramundi nutrition?
Baking or grilling a raw barramundi fillet evaporates roughly 22% of its water weight, shrinking a 113g raw fillet to ~88g cooked. Total protein (98% retained) and calories in the piece remain virtually unchanged, while heat-sensitive B vitamins decrease by 10–20%.
Can I enter my own barramundi package label to see how cooking changes it?
Yes! Use our dedicated Cooking Nutrition Calculator (/tools/cooking-nutrition-calculator/) to select Barramundi (or any of 420+ foods), edit the exact calories, protein, fat, and sodium from your bag, and see how your cooking method changes the nutrients.
Is barramundi the same as Chilean sea bass?
No. Barramundi (Lates calcarifer) is a lean warm-water Asian/Australian sea bass with 88–97 kcal and 1.8–2.0g fat per 100g raw. Chilean sea bass (Patagonian toothfish) is a deep-water fish with 146 kcal and 9.6g fat per 100g.

Important Notice

This tool is for informational and journaling purposes only. Nutritional values are based on USDA FoodData Central reference data, USDA Release 6 Nutrient Retention Factors, and standard aquaculture package specifications. Actual values may vary by brand and cooking time.

About the Author

Manish Kumar - Author
Manish KumarNASM Certified Personal Trainer (CPT)

Certified fitness professional and nutrition researcher with over 10 years of experience in the fitness and wellness industry. Founder of Food Nutrify, dedicated to making accurate, science-backed nutrition data accessible to everyone through free, easy-to-use calculators.

NASM Certified Personal TrainerSports Nutrition Specialist

References & Sources

  1. [1] USDA FoodData Central (2026). Sea bass / Barramundi raw and cooked reference profiles (FDC 15007 / 15008). U.S. Department of Agriculture.
  2. [2] Australis Aquaculture (The Better Fish) (2026). Barramundi Nutrition Facts — 4 oz (113g) Raw Fillet Specification. Aquaculture Nutrition Reference.
  3. [3] Nutrient Data Laboratory, Beltsville Human Nutrition Research Center (2007). USDA Table of Nutrient Retention Factors, Release 6. U.S. Department of Agriculture.