Including seafood, fish, shrimp, shellfish and other categories. Although marine life such as kelp is often cooked into food, seafood is mainly cooked for animals. In a narrow sense, only fresh seafood can be called seafood. Seafood can be divided into live seafood and frozen seafood. Related information: raw seafood should be frozen and watered with light salt water. Oysters and some aquatic shellfish often carry a kind of "Vibrio vulnificus" bacteria, which is potentially fatal to people with poor intestinal immune function. Medical experts point out that putting oysters on ice first and then pouring some light salt water can effectively kill bacteria and make them safer to eat raw. Although seafood is rich in nutrition, it is not suitable for eating more. Affected by marine pollution, seafood often contains toxins and harmful substances. Excessive consumption can easily lead to spleen and stomach damage and cause gastrointestinal diseases. If you don't eat properly, food poisoning will occur in severe cases. So pay attention to eating seafood in moderation, usually once a week.