I don't think we should be obsessed with nutritional value. Generally speaking, sea crabs are delicious and river crabs are delicious. They are two different things and cannot be compared. For example, what is the difference in nutritional value between eating pork and fish? Meat has the nutrition of meat and fish has the nutrition of fish. It just depends on your choice. You can eat a little if you like, right? Delicious life is not fast.