Needs to be removed.
Contaminants such as heavy metals tend to accumulate in the viscera of shellfish organisms, and the content of heavy metals is lowest in the muscles. Therefore, only the muscle parts of the shellfish should be eaten. "Look at the color" is the simpler way to judge. After opening the shell, the slightly blackened pieces of meat are mostly viscera. Some shellfish have a black line of sand inside and cannot be eaten. Extended information
Notes
1. Choose fresh oysters with tightly closed shells and pry them open yourself at home, and eat them as soon as possible. If it is oysters that have been shucked beforehand, or if you go to a barbecue restaurant to eat oysters, you have to check and smell them carefully to see if they are fresh.
2. Affected by marine environmental pollution, many seafood products face the problem of excessive levels of heavy metals and other pollutants. If oysters grow in polluted waters, they may contain more heavy metals in their bodies. It is okay to try them occasionally to satisfy your cravings, but it is not advisable to eat them every day.
3. Oysters are filter-feeding shellfish and can easily accumulate pathogenic microorganisms in the body, especially norovirus and Vibrio parahaemolyticus. Every year, there are many cases of food poisoning caused by eating oysters. event occurs. Therefore, the delicious taste is valuable, but the health value is higher. If you are not sure about the quality of the oysters, you should avoid eating the oysters raw and heat them properly when cooking.
Reference materials: People's Daily Online "Three Tips to Stay Safe When Eating Shellfish: Soak in Salt Water and Don't Eat the Offal"
People's Daily Online "How to Eat Delicious Oysters, What's the Safest Way to Eat them?" 》