Which has more calories, Crustaceans, Crab or Fish, Tuna?

Per 100 g: Crustaceans, Crab has 83 kcal, Fish, Tuna has 198 kcal.

Which has more protein, Crustaceans, Crab or Fish, Tuna?

Per 100 g: Crustaceans, Crab has 17.9 g of protein, Fish, Tuna has 29.1 g.

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.

Fish & Seafood Crustaceans, Crab 83 kcal · 100 g VS Fish & Seafood Fish, Tuna 198 kcal · 100 g

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.

At a glance

Crustaceans, Crab on the left, Fish, Tuna on the right. The longer bar holds more per 100 g; green marks the generally more favorable value.

Calories

83 kcal

198 kcal

Protein

17.9 g

29.1 g

Total Fat

0.7 g

8.2 g

Carbohydrate

0 g

Dietary Fiber

0 g

Total Sugars

0 g

—

Nutrient comparison (per 100 g)

Nutrient	Crustaceans, Crab	Fish, Tuna
Calories	83 kcal	198 kcal
Protein	17.9 g	29.1 g
Total Fat	0.7 g	8.2 g
Saturated Fat	0.2 g	1.5 g
Carbohydrate	0 g	0 g
Dietary Fiber	0 g	0 g
Total Sugars	0 g	—
Sodium	563 mg	50 mg
Potassium	259 mg	207 mg
Calcium	91 mg	13 mg
Iron	0.5 mg	1.4 mg
Magnesium	36 mg	31 mg
Vitamin C	3.3 mg	0 mg
Vitamin A	1 mcg	—
Vitamin D	0 mcg	—
Cholesterol	97 mg	18 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

Protein91.5%17.9 g
Fat8.5%0.7 g
Carbs0%0 g

Fish, Tuna

Protein61.2%29.1 g
Fat38.8%8.2 g
Carbs0%0 g

Frequently asked questions

Which has more calories, Crustaceans, Crab or Fish, Tuna?: Per 100 g: Crustaceans, Crab has 83 kcal, Fish, Tuna has 198 kcal.
Which has more protein, Crustaceans, Crab or Fish, Tuna?: Per 100 g: Crustaceans, Crab has 17.9 g of protein, Fish, Tuna has 29.1 g.

Compare with other foods

Crustaceans, Crab vs Alaska Pollock, Raw Crustaceans, Crab vs Anchovies, Canned In Olive Oil Crustaceans, Crab vs Cod, Pacific Or Alaskan Crustaceans, Crab vs Crustaceans, Crab Fish, Tuna vs Alaska Pollock, Raw Fish, Tuna vs Anchovies, Canned In Olive Oil Fish, Tuna vs Cod, Pacific Or Alaskan Pick a pair manually

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.