Animal toxin is a term used to describe any toxic substance produced by an animal. VENOM is one of the most common types of animal toxins, and is typically produced by snakes, spiders, and other invertebrates. VENOM is a complex mixture of proteins, enzymes, and other compounds that can cause serious injury or even death when injected into a victim. It is usually injected through the animal's fangs or stingers, and can cause severe pain, swelling, and tissue damage.