The characteristics and hazards of puffer fish are: round body, big head and chest, small belly and small tail; There are bright stripes or colors on the back, the body surface is scaleless, smooth or prickly, and there are two obvious front teeth on the upper and lower sides; Abdominal distension will occur in unfavorable environment.

Hazard: The tetrodotoxin contained in the body is concentrated in organs such as ovary, testis, liver and blood. Its toxicity is 1000 times higher than that of the highly toxic drug sodium cyanide. After eating for half an hour, people may have symptoms such as numbness of lips, tongue and limbs. In severe cases, they will die because of loss of consciousness, breathing and heartbeat, or become vegetative. Because of the stable nature of toxins, salt curing, sun exposure and general heating cooking can not eliminate toxins. Poisoned patients have no specific drugs to detoxify.