These different toxins are called conotoxin, which includes different peptides and targets specific nerve channels or receptors. This toxin also contains analgesic ingredients, which can make the prey motionless and very calm before death.
There are also some heart snails that contain tetrodotoxin, which is the same as neurotoxin in puffer fish. This toxin is found in puffer fish and blue-ringed octopus.
The bright colors and patterns on the surface of the heart-shaped snail can easily attract curious people to pick them up, so the tragedy happened.
So far, there have been more than 30 deaths caused by the venom of the heart snail. There is also a kind of chicken-heart snail, which people usually call "cigar snail", which means that after being stung by it, there is usually only time left to smoke a cigar to save it.