Dried Crayfish contains essential vitamins and minerals, it helps to promote the overall body health. It provides a good amount of B vitamins including vitamin B-12 to the body. Crayfish is packed with high-quality protein. A 5-ounce serving of crayfish contains close to 25 grams of protein.It serves also as a source of iron, daily intake of crayfish which aids in improving the production and circulation of blood in the body and can effectively reduce the chances of developing anemia and other low iron-related health conditions.he seasoning bags and seasoning liquid used in a crawfish boil are extremely high in sodium. So much so that a person with high blood pressure almost hits his or her daily sodium intake in just a single serving of boiled crawfish and vegetablesIn essence, the B vitamins in crayfish are essential for nervous system function, turning the food you eat into energy and keeping your liver, eyes, skin and hair healthy.