Crayfish, also known as crawfish, crawdads, crawldads, freshwater lobsters, mountain lobsters, mudbugs or yabbies, are freshwater crustaceans resembling small lobsters. Length: Red king crab: 1.8 m Phylum: Arthropod Nutrition Facts Crayfish, cooked Amount Per 100 grams Calories 87 % Daily Value* Total Fat 1.3 g2% Saturated fat 0.2 g1% Polyunsaturated fat 0.4 g Monounsaturated fat 0.3 g Cholesterol 137 mg45% Sodium 97 mg4% Potassium 238 mg6% Total Carbohydrate 0 g0% Dietary fiber 0 g0% Protein 18 g36% Vitamin A1%Vitamin C0% Calcium5%Iron6% Vitamin B-65%Vitamin B-1251% Magnesium8%