Lobsters can be divided into freshwater and seawater. Lobsters that grow in the sea are seafood, while those in freshwater are not seafood.

Crayfish is not a seafood, but a type of river shrimp, which is a river delicacy.

Crayfish are rich in magnesium. Magnesium plays an important role in regulating heart activity and can well protect the cardiovascular system. It can reduce the cholesterol content in the blood and prevent arteriosclerosis. It can also expand the coronary arteries and help prevent high blood pressure.

blood pressure and myocardial infarction.