The heavy metal content varies with its size and location, and the trend is that the heavy metal content in large-size samples is relatively high, and the growth of heavy metal content in tilapia and Penaeus vannamei is positively correlated with their body weight. The content of heavy metals in viscera of tilapia is significantly higher than that in muscle tissue, and the head of shrimp is the main part of shrimp.
But there is indeed a very delicious ingredient in shrimp head, that is, shrimp eggs, commonly known as "yellow"
When the mother shrimp is mature, the head and neck will contain shrimp yellow, so the shrimp with shrimp yellow must be the mother shrimp, but not the male shrimp. The mother shrimp is immature and can't see the shrimp yellow. Most people are familiar with crab roe, but they know little about shrimp. Before pregnant with eggs, the mother shrimp contains shrimp in her head and neck, commonly known as "red-headed baby".
If you want shrimp yellow, you don't want anything else. Take your time when you eat. In fact, due to the removal of heavy metals, the harm of its excrement to human body is very weak.
Some places have the habit of eating shrimp paste. After consulting the practice, I do use the whole shrimp head.
We often say that "shrimp head" is the head and chest of shrimp, and the boundary between the head and chest of shrimp is not obvious, so they are collectively called head and chest. There is a structure called pericardial sinus in the head and chest, including stomach, liver, heart, antenna gland of excretory organs (also called green gland because it is green), bladder and excretory orifice.