The toxic component of puffer fish is tetrodotoxin, which is a neurotoxin. People can die if they eat 0.5mg-3mg of dolphin poison. The liver, spleen, kidney, ovary, testis, eyeball, skin and blood of puffer fish are all toxic. Eggs, ovaries and liver are the most poisonous, followed by kidneys, blood, eyes and skin. The toxin is heat-resistant,100℃ will not be destroyed for 8 hours, 120℃ 1 hour, and neither salt curing nor sun exposure can destroy the toxin.

Under natural conditions, puffer fish mainly feeds on aquatic invertebrates, and also feeds on other animals and plants. It is an omnivorous fish with partial animal feeding. Under artificial feeding conditions, it can also feed on artificial compound feed after being tamed.