Toxic animals are creatures that produce harmful substances, which can be dangerous to humans and other animals. These toxins can be found in their skin, venom, or even in their body fluids. For example, the poison dart frog has bright colors that warn predators of its toxicity, while the box jellyfish can deliver a painful sting that may be fatal. Some toxic animals use their poisons for defense, while others use them to capture prey. The pufferfish, for instance, contains a potent toxin called tetrodotoxin, which can be deadly if consumed. Understanding these animals helps us appreciate the complexity of nature and the importance of respecting wildlife.