NutriBase

Crustaceans, Crab vs Mollusks, Oyster: Nutrition Comparison

Compare calories, protein, fat, carbs, vitamins and minerals per 100 g. Values shaded green are generally the more favorable ones.

Fish & Seafood Crustaceans, Crab 83 kcal · 100 g VS Fish & Seafood Mollusks, Oyster 199 kcal · 100 g

Key differences

  • Mollusks, Oyster has more calories; Crustaceans, Crab is lower in calories.
  • Crustaceans, Crab has more protein per 100 g.
  • Mollusks, Oyster is notably higher in iron.

Nutrient comparison (per 100 g)

Nutrient Crustaceans, Crab Mollusks, Oyster
Calories 83 kcal 199 kcal
Protein 17.9 g 8.8 g
Total Fat 0.7 g 12.6 g
Saturated Fat 0.2 g 3.2 g
Carbohydrate 0 g 11.6 g
Dietary Fiber 0 g —
Total Sugars 0 g —
Sodium 563 mg 417 mg
Potassium 259 mg 244 mg
Calcium 91 mg 62 mg
Iron 0.5 mg 7 mg
Magnesium 36 mg 58 mg
Vitamin C 3.3 mg 3.8 mg
Vitamin A 1 mcg 90 mcg
Vitamin D 0 mcg —
Cholesterol 97 mg 71 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%

Mollusks, Oyster

  • Protein 18%
  • Fat 58.1%
  • Carbs 23.9%

Frequently asked questions

Which has more calories, Crustaceans, Crab or Mollusks, Oyster?
Per 100 g: Crustaceans, Crab has 83 kcal, Mollusks, Oyster has 199 kcal.
Which has more protein, Crustaceans, Crab or Mollusks, Oyster?
Per 100 g: Crustaceans, Crab has 17.9 g of protein, Mollusks, Oyster has 8.8 g.

Compare with other foods

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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.