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High-protein, zero-carb marine fish
In season: Spring · Summer · Autumn · Winter
CALORIES · 100 G
GI
POTASSIUM · 100 G
FIBER · 100 G
1 piece (medium) of Dusky grouper (170 g) has 201 calories. That works out to 118 calories per 100 g. It contains 0 g of carbs, 42.2 g of protein, 2.2 g of fat and 0 g of fiber. Its 3.2 µg of B12 covers 135% of the Daily Value. Its glycemic index is 0 (low), so it raises blood sugar slowly.
Selected: 1 piece (medium) · 170 g
201
KCAL / 170G
Carbs
0g
· 0% DV
Protein
42.2g
· 84% DV
Fat
2.2g
· 3% DV
Fiber
0g
· 0% DV
DV is the share of the daily value covered, on a 2,000 kcal reference diet.
Calories come from: Carbs 0% · Protein 90% · Fat 10%
| Nutrient | Amount | % DV |
|---|---|---|
| Calories | 201 kcal | |
| Total fat | 2.2 g | 3% |
| Saturated fat | 0.51 g | 3% |
| Trans fat | 0 g | |
| Sodium | 90 mg | 4% |
| Total carbohydrate | 0 g | 0% |
| Fiber | 0 g | 0% |
| Protein | 42.2 g | 84% |
Calories: Calories measure energy. Average daily need is 2,000 kcal. Excess calories are stored as fat, too few cause weight loss.
Carbs: Your body's primary energy source. The brain runs exclusively on carbs. Daily need: 275g.
Protein: Essential for muscle repair and cell growth. Daily need: 50g. Keeps you full and boosts metabolism.
Fat: Needed for hormone production and vitamin absorption. Daily need: 78g. Limit saturated fats, choose unsaturated.
Fiber: Critical for digestive health and satiety. Daily need: 28g. Stabilizes blood sugar, lowers cholesterol.
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| Serving | Amount | Calories |
|---|---|---|
| 1 piece (medium) | 170 g | 201 kcal |
| 1 ounce (whole) | 28.4 g | 33 kcal |
| 1 piece (small) | 90 g | 106 kcal |
| 100 g | 100 g | 118 kcal |
| 1 cup (shredded) | 120 g | 142 kcal |
| 1 cup (diced) | 140 g | 165 kcal |
| 1 serving (medium) | 150 g | 177 kcal |
| 1 serving (large) | 250 g | 295 kcal |
| 1 piece (large) | 260 g | 307 kcal |
Calculated from 118 calories per 100 g.
Dusky grouper has a mild, clean sea flavour and firm, white flesh that flakes into large pieces. It is less oily and intense than many dark-fleshed fish, so simple seasonings such as lemon, herbs and olive oil work well.
Dusky grouper works well grilled, baked, pan-seared or cooked in a stew. Its thick, firm flesh holds together during cooking; use fillets or steaks and stop cooking once the centre turns opaque and separates easily.
Dusky grouper lives in the Mediterranean Sea and the eastern Atlantic, commonly around rocky reefs and underwater caves. It tends to stay close to the seabed, where it shelters among rocks and hunts smaller fish and crustaceans.
No. Dusky grouper and sea bass are different fish, although both have mild-tasting white flesh. Dusky grouper is usually thicker and firmer, making it a good choice for substantial steaks, while sea bass is often served whole or as a thinner fillet.
Grill dusky grouper in thick steaks or skin-on fillets, and make sure the grill is hot and clean before the fish goes on. Turn it only once, after the first side releases easily; delicate, thin pieces are better cooked in a basket.
Dusky grouper fillets have relatively few small bones, but steaks may retain bones near the backbone. Check the flesh carefully before serving, especially when preparing a portion for a child.
Fresh dusky grouper should smell mild and briny rather than sour or strongly fishy, with moist, firm flesh that springs back when pressed. If buying a whole fish, look for clear, bright eyes and shiny skin rather than dull, dry surfaces.
Yes, dusky grouper freezes well when wrapped tightly to limit air exposure. Freeze it as soon as possible after purchase, then thaw it in the refrigerator and cook it promptly; avoid leaving it out at room temperature to thaw.
Dusky grouper populations have been affected by fishing pressure, and its conservation status makes responsible sourcing important. Choose fish from a traceable, legal source and follow local seafood guidance; avoid buying undersized or illegally caught grouper.
Cooked dusky grouper can be part of a pregnancy diet, but mercury exposure can vary with the fish’s size and origin. Follow local advice on fish portions and species during pregnancy, and ask a healthcare professional if you need guidance for your circumstances.
Vitamins
B12
3.23µg · 135% DV
B3
7.14mg · 45% DV
B6
0.68mg · 40% DV
B5
1.27mg · 25% DV
Minerals
Selenium
61µg · 111% DV
Phosphorus
374mg · 53% DV
Iodine
60µg · 40% DV
Potassium ⭐
646mg · 19% DV
Sodium
90mg · 4% DV
GLYCEMIC INDEX
GLYCEMIC LOAD
Accounts for portion size — a more realistic measure than GI alone.
To burn the 201 calories in 1 piece (medium) (170 g):
🚶
Walking (5 km/h)
🏃
Running (8 km/h)
🚴
Cycling
🏊
Swimming
Times are calculated with the MET equation for a 70 kg adult. Actual burn varies with your weight, age and pace.
Dusky grouper is a large reef fish found in the Mediterranean and parts of the eastern Atlantic. Its firm, white flesh has a mild, clean flavour and holds together well during cooking, making it a favourite for simple preparations that let the fish take centre stage. It is commonly grilled, baked or cooked in a pan, often with olive oil, herbs and lemon.
Around the Mediterranean it may be served whole or as steaks, with vegetables, salad or potatoes; elsewhere, it also works well in tacos or fish stews. It is a lean, protein-rich choice, with 24.8 g of protein and no carbohydrates per 100 g. Grilling or baking it instead of deep-frying keeps the meal lighter, and a bright salad makes a natural pairing.
High
How many vitamins, minerals and how much fiber this food carries per calorie. A high score means a lot of nutrition for few calories.
Medium
An EatBetter score computed from fiber, protein and calorie density. A high score means staying full longer on the same calories.
Both scores are calculated per 100 g and do not change with the selected portion. The satiety score is EatBetter's own calculation, not a clinical measure.
NOVA 2
Minimally Processed
1. Unprocessed
2. Minimally Processed
3. Processed
4. Ultra-Processed
NOVA classifies foods into 4 groups by industrial processing. NOVA 1 (unprocessed) is the healthiest.
Contains these allergens:
Vegan
— Not suitable
Vegetarian
— Not suitable
Gluten-Free
✓ Suitable
Dairy-Free
— Not suitable
Mediterranean
✓ Suitable
Paleo
✓ Suitable
Whole30
— Not suitable
DASH
— Not suitable
Keto
✓ Suitable
Low FODMAP
— Not suitable
SATURATED
0.51g
MONOUNSATURATED
0.6g
POLYUNSATURATED
0.56g
Omega 6:3 ratio 0.2:1
Below the ideal 4:1 — a good omega balance.
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Nutrition data compiled from USDA FoodData Central and scientific sources.