Venom is a toxin produced biologically by several life forms, used to either secure prey and/or to defend from predators. Some venoms can cause illness, can even be fatal to Humans, other species.
- Earth:
- Certain insects, such as Bees and Ants, Wasps
- Some fish, such as the Stonefish and Jellyfish
- Some shellfish, such as the Cone Shell
- Certain Arachnids, such as Scorpions and Spiders, Ticks
- Certain Reptiles, incl. Snakes
- Certain Amphibians, especially certain frogs (Poison Dart Frog) and Toads, Salamanders
- Shrews
- The Oilbird
- Other Planets:
- Neural - The Mugato
- Klingon Home World - The Klingon Reptoid predecessor has poisonous fangs (When Worf morphed into this organism, he spat poison, like a spitting cobra at Dr. Crusher and injected it into other crew personnel on the Enterprise D)