There are many poisonous animals in the world, each with their own unique adaptations and methods of delivering toxins. Some of the most well-known poisonous animals include:

1.Poison dart frogs: These brightly colored frogs secrete toxic alkaloids through their skin, which can cause paralysis or death to predators.

2.Box jellyfish: Found primarily in the waters of Australia and Southeast Asia, box jellyfish have tentacles lined with thousands of tiny stinging cells that can cause heart failure and death in humans.

3.King cobra: The king cobra is the largest venomous snake in the world and can deliver enough venom in a single bite to kill an elephant.

4.Blue-ringed octopus: This small but deadly octopus found in the waters of Australia and Southeast Asia has enough venom to kill 26 adult humans in just a few minutes.

5.Cone snails: These snails have a modified tooth-like structure called a radula that they use to inject potent venom into their prey. Some species of cone snails can also be deadly to humans.

6.Stonefish: Found in the waters of the Indo-Pacific, stonefish have venomous spines that can cause excruciating pain, paralysis, and even death.

7.Poisonous spiders: There are several species of poisonous spiders, including the black widow and the brown recluse, which can cause serious medical problems or even death in humans.

These are just a few examples of the many poisonous animals in the world. It's important to exercise caution and respect when interacting with any potentially dangerous animals.