Poisonous animals are creatures that produce toxins, which can be harmful or even deadly to other animals and humans. These toxins can be found in various parts of their bodies, such as skin, venom, or even their blood. Examples of poisonous animals include the poison dart frog, known for its bright colors and potent skin toxins, and the box jellyfish, which has tentacles that deliver a painful sting. Some animals use their poison for defense, while others use it to capture prey. The pufferfish, for instance, contains a deadly toxin called tetrodotoxin, which can be lethal if consumed. Understanding these animals helps us appreciate the complexity of nature and the importance of respecting wildlife.