This is because both the wild clam and the sea rainbow have toxins due to the increase of toxic algae in seawater recently, and this toxin will cause discomfort to the human body after being ingested by the human body, so Tangshan will have this reminder. In fact, whether it is Scapharca subcrenata or Haihong, both of them belong to more popular seafood. These two species are also widely distributed in China, among which Scapharca subcrenata is mainly distributed in shallow sea areas such as Bohai Bay and Liaodong Bay, and Tangshan, Hebei Province is one of the main producing areas of Scapharca subcrenata. As far as Haihong is concerned, Tangshan, located in Bohai Bay, is not its main producing area, but it also produces a lot.

As the saying goes, Tangshan, Hebei Province, which is close to the Bohai Sea in the south, often eats seafood, including clam and rainbow. However, not long ago, Tangshan issued a warning to remind the public not to eat wild clam and sea rainbow in the near future. The reason why Scapharca subcrenata and Haihong are suddenly classified as cautious foods is attributed to the warming weather. The warmer weather makes the seawater temperature rise, and many substances in the water also increase. Thanks to the increase of nutrients in water, algae in seawater proliferate and grow rapidly. However, their mass reproduction leads to a large amount of oxygen absorption and consumption in the water, in which case the seawater will be red tide due to lack of oxygen.

There are a large number of harmful algae in the seawater in the red tide state, and these algae happen to be the food of shellfish such as clam and sea rainbow. Because of this connection, shellfish such as clam and sea rainbow will start to carry toxins in their bodies because they feed on algae. At this time, if people eat clam and sea rainbow again, these toxins will be transformed into a part of the human body. When the toxins ingested by the human body accumulate to a certain extent, symptoms such as dizziness, nausea and paralysis of hands and feet caused by toxins will follow.

So far, cases of poisoning and even death have occurred from time to time because of eating seafood such as clam and sea rainbow during the high incidence of red tide. In order to avoid this kind of situation happening again and again, Tangshan, Hebei Province will issue a reminder to eat wild clam and sea rainbow carefully in the near future. According to the warning content issued by Tangshan, it can be known that the recent red tide phenomenon that leads to the inedible wild clam and sea rainbow mostly appears from May to August every year. In addition, the toxin carried by shellfish such as Scapharca subcrenata and sea rainbow is mainly paralytic shellfish toxin, which is not only highly toxic but also has no specific detoxification method, so we must pay more attention to it.

If you really want to eat clam or sea rainbow during this period, you must avoid shellfish from red tide areas when buying. Then it is best to remove all the internal organs of shellfish when cooking, and don't eat too much at once. If you feel unwell after eating, remember to see a doctor in time.