1, the threaded snail is a poisonous creature, every spring and summer its toxicity is greater, after eating can cause dizziness, vomiting, lips and fingers numbness and other symptoms of poisoning. The shortest incubation period is 5 minutes and the longest is 4 hours. The State Ministry of Health has expressly prohibited the sale of snails.

2, the appearance of threaded snail is characterized by a pointed tail, slender, about the size of a nail cap. The threaded snail contains river herring toxin easy to lead to food poisoning, from the appearance of the threaded snail shaped like a cone, the size of the nail cap is similar, circling 8 layers, the base of the contraction. The tail of the snail is more pointed, the snail body is slender, about 1 cm in length and 0.5 cm in width, the shell surface often has 1-3 purple-brown or reddish-yellow bands of snails, and the flesh is light yellow. Stir-fried whelks have distinct color layers and a small appearance.