Because fish heads generally contain many parasites, especially the gills inside the head, so when we kill the fish we usually cut the gills on top of the head because the gills also contain a small amount of toxins.

Normally, there are no toxins present inside the fish head and it is safe to eat it. However, due to the deterioration of the overall environment in recent years has led to the pollution of waters and ecological plant chain, coupled with some farmers to add chemicals in the feed, to a certain extent, will make the fish body of the harmful substances increased and difficult to discharge, may be accumulated in the fish head to go.

Life habits of the rice fish:

The rice fish belongs to the warm temperate demersal marine fish, inhabiting in water depths of 15-70 meters, the substrate for the mud or mud and sand sea area, sinking during the day, floating at night, like a small dispersal of the activities of small groups, not set into a large group. Rice fish is a small regional migratory fish, and the fish group is relatively concentrated during the spawning season. It is a predatory fish that feeds on small fish, guanapods and decapods.

The ricefish is distributed in the western North Pacific Ocean, including the Bohai Sea, Yellow Sea and East China Sea in China, Korea and southern Japan. China's coastal fishing grounds of the main production of rice fish are: Guangdong Chaoshan fish farms in Fujian Pingtan Island and Brother Island, Zhejiang Daishan and Zhoushan Islands, Jiangsu Dasha fishery, Shandong coast and the Bohai Sea, especially in the East China Sea, Zhoushan Islands production is the largest, is one of the sea fishery specialties around Ningbo.