There are a variety of animals that produce toxins that can cause serious illness or death in humans if ingested. Some of these animals include snakes, spiders, scorpions, and jellyfish. These toxins can cause a variety of symptoms including nausea, vomiting, diarrhea, seizures, and even death. It is important to be aware of these dangers and to avoid contact with these animals if possible. If you or someone you know has been exposed to one of these toxins, it is important to seek medical attention immediately as the consequences can be severe.