is the black membrane in the belly of the fish? The black membrane in the belly of the fish is the visceral layer of its peritoneum. This kind of thing is a part of its body, the role is to lubricate and protect the internal organs, the reason is black, because of melanin precipitation in the body, not because of some toxic substances. It should be noted that although it is edible, its nutritional value is not high, and its fat content is high, so it is not recommended to eat, it is best to remove it when handling.
1. Fish gall bladder: Most of the fish gall bladder can not be eaten, many common edible fish gall bladder is even poisonous, such as grass carp, carp, crucian carp, silver carp and so on, so it is best to remove it when dealing with it. It should be noted that it must not be punctured, otherwise it will contaminate the fish and have a certain bitter taste.
2. Fish gills: Fish gills are the respiratory organs of fish. Because of the exchange of blood and gas, they look red and have high iron content. However, it should be noted that some bacteria, microorganisms and even parasites will hide in them, so they can not be eaten, otherwise they may be infected with diseases.
3. Fish scales: Fish scales themselves are not poisonous, but the taste is very bad, so it is generally not recommended to eat. The main nutrient in this substance is collagen, but the content is relatively low, not as high as pigskin, and can not be directly used and absorbed by the human body, so it is not recommended to eat.
