Fish, Tuna vs Mollusks, Octopus: 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; Mollusks, Octopus is lower in calories.
- Fish, Tuna has more protein per 100 g.
- Mollusks, Octopus is notably higher in iron.
- Mollusks, Octopus is notably higher in calcium.
- Mollusks, Octopus is notably higher in potassium.
Nutrient comparison (per 100 g)
| Nutrient | Fish, Tuna | Mollusks, Octopus |
|---|---|---|
| Calories | 184 kcal | 164 kcal |
| Protein | 29.9 g | 29.8 g |
| Total Fat | 6.3 g | 2.1 g |
| Saturated Fat | 1.6 g | 0.5 g |
| Carbohydrate | 0 g | 4.4 g |
| Dietary Fiber | 0 g | 0 g |
| Total Sugars | — | 0 g |
| Sodium | 50 mg | 460 mg |
| Potassium | 323 mg | 630 mg |
| Calcium | 10 mg | 106 mg |
| Iron | 1.3 mg | 9.5 mg |
| Magnesium | 64 mg | 60 mg |
| Vitamin C | 0 mg | 8 mg |
| Vitamin A | 757 mcg | 90 mcg |
| Vitamin D | — | 0 mcg |
| Cholesterol | 49 mg | 96 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.
Fish, Tuna
- Protein 67.9%
- Fat 32.1%
- Carbs 0%
Mollusks, Octopus
- Protein 76.7%
- Fat 12%
- Carbs 11.3%
Frequently asked questions
- Which has more calories, Fish, Tuna or Mollusks, Octopus?
- Per 100 g: Fish, Tuna has 184 kcal, Mollusks, Octopus has 164 kcal.
- Which has more protein, Fish, Tuna or Mollusks, Octopus?
- Per 100 g: Fish, Tuna has 29.9 g of protein, Mollusks, Octopus has 29.8 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.