Venomous species are organisms that produce toxins used for defense or to subdue prey. These toxins can be delivered through bites, stings, or specialized structures. Common examples include snakes, spiders, and jellyfish, each with unique venom that can affect the nervous system, blood, or tissues of other animals. The purpose of venom varies among species. For instance, cobras use their venom to immobilize prey, while scorpions may use it for both hunting and protection. Understanding these species is crucial for both ecological balance and human safety, as some venomous creatures can pose significant risks to people.