2. The shrimp yellow of crayfish generally exists in the mother shrimp, which is the egg of mature mother shrimp. Like crab roe, it is very delicious, nutritious and edible. However, the shrimp yellow of crayfish is very small, which is closely related to other organs such as shrimp stomach and brain, and these organs contain more pathogenic bacteria, heavy metals and excreta, so many people can't distinguish the shrimp yellow, so it is easy to eat these organs together, which is easy to cause gastrointestinal problems.