Low in fat and calories, high in protein and minerals, crawfish can be included in the diet of anyone who is concerned about cholesterol, fat or calories.Crawfish are high in vitamins including A, B6 and B12, Biotin and Niacin, and are a good source of calcium, phosphorus, iron and protein.Although crawfish tend be be higher in cholesterol than most other shellfish, a 3 1/2 ounce serving provides