Heartworm; Chicken heart snail, also known as conus, belongs to Gastropoda, Conidae. Heartworm is a beautiful snail that lives on coral reefs and beaches along the coast. It is sharp in the front and thick in the back, shaped like a chicken's heart or taro. There are many kinds of chickenheart snails with different colors and patterns, and they generally live in warm seas. Chicken heart snail is a kind of highly toxic marine life, and its tip part hides a small opening, from which a poisonous needle is enough to make the injured die. The poison dart frog is distributed in Latin America from Nicaragua to southeastern Brazil and Bolivia, and it is the most famous poisonous animal in the world. Because of its bright warning color, poison dart frog is also the most beautiful member of the frog. Most of the poison dart frogs are very small, the smallest is only 1.5 cm, but a few members can reach 6 cm. The most deadly toxin comes from the Cochrane frog produced in Colombia, and only 0.0003 gram is enough to poison a person. The most toxic poison dart frog has enough toxin to kill 20 thousand mice, the Brazilian caterpillar; This is a moth larva that lives in southern Brazil. Although people have long been psychologically prepared for the appearance of caterpillars, this disgusting appearance of Brazilian caterpillars can still scare people. From its beautiful protective color, we can know that its toxicity can not be underestimated. It is said that many people die from this caterpillar poison every year. At the same time, this caterpillar toxin is also a very good anticoagulant, which can be used to treat unexpected wounds. Kissing sea snakes; The gelsemid sea snake is slender, grayish white, with discontinuous light blue stripes, a large shovel-like scale under the lower jaw, and loose skin on the head, which can make the mouth open very wide. The gelsemid sea snake is very toxic and dangerous, and there is no medicine to solve this poison. It lives in the sea from the coast of the Persian Gulf to the Philippines and northern Australia. One bite of the venom it injects is enough to kill 50 people. The stone fish, which is unremarkable in appearance and only about 30 cm in length, often hides at the bottom of the sea or under a rock reef and disguises itself as an inconspicuous stone. Even if you stand beside it, it will not move, so that you can't find it. If you don't pay attention to touching it, it will fight back immediately and emit deadly poison. The dozen needles-sharp backstab on its back will easily penetrate your sole and pierce the soles of your feet, making you poisoned quickly and in severe pain until the Australian box jellyfish dies; The most poisonous jellyfish is the Australian box jellyfish, and the toxin of one box jellyfish is enough to kill 60 adults. If you are poisoned by a box jellyfish, you will die if you are not treated within 4 minutes. Australian box jellyfish is a kind of light blue transparent jellyfish, which is shaped like a box and has four obvious sides, each of which is 20 cm long. The box jellyfish has 60 tentacles 3 meters long, each of which is covered with stinging cells for storing venom. At present, the only way to avoid its attack is not to swim in the sea where this jellyfish is infested. At present, warning signs have appeared on all beaches in northeastern Australia to remind people of this jellyfish. Scientists are trying to find a more effective antidote and ways to prevent its attack.