Crustaceans, Crab vs Fish, Tuna: Nutrition Comparison
Compare calories, protein, fat, carbs, vitamins and minerals per 100 g. Values shaded green are generally the more favorable ones.
Key differences
- Fish, Tuna has more calories; Crustaceans, Crab is lower in calories.
- Fish, Tuna has more protein per 100 g.
- Fish, Tuna is notably higher in iron.
- Crustaceans, Crab is notably higher in calcium.
Nutrient comparison (per 100 g)
| Nutrient | Crustaceans, Crab | Fish, Tuna |
|---|---|---|
| Calories | 83 kcal | 184 kcal |
| Protein | 17.9 g | 29.9 g |
| Total Fat | 0.7 g | 6.3 g |
| Saturated Fat | 0.2 g | 1.6 g |
| Carbohydrate | 0 g | 0 g |
| Dietary Fiber | 0 g | 0 g |
| Total Sugars | 0 g | — |
| Sodium | 563 mg | 50 mg |
| Potassium | 259 mg | 323 mg |
| Calcium | 91 mg | 10 mg |
| Iron | 0.5 mg | 1.3 mg |
| Magnesium | 36 mg | 64 mg |
| Vitamin C | 3.3 mg | 0 mg |
| Vitamin A | 1 mcg | 757 mcg |
| Vitamin D | 0 mcg | — |
| Cholesterol | 97 mg | 49 mg |
Green highlighting marks the more favorable value where it applies (for example, more protein or less saturated fat). Neutral nutrients are not highlighted.
Data source: USDA FoodData Central. Values are per 100 g of edible portion and are reference figures — they vary by variety, preparation and brand. Last updated: 2026-04-30.
Crustaceans, Crab
- Protein 91.5%
- Fat 8.5%
- Carbs 0%
Fish, Tuna
- Protein 67.9%
- Fat 32.1%
- Carbs 0%
Frequently asked questions
- Which has more calories, Crustaceans, Crab or Fish, Tuna?
- Per 100 g: Crustaceans, Crab has 83 kcal, Fish, Tuna has 184 kcal.
- Which has more protein, Crustaceans, Crab or Fish, Tuna?
- Per 100 g: Crustaceans, Crab has 17.9 g of protein, Fish, Tuna has 29.9 g.
Compare with other foods
Note. This information is provided for general reference only and is not medical advice or a diet prescription. If you have a medical condition or special dietary needs, consult a physician or a registered dietitian.