Stingray almost gets revenge! Who all is rooting for stingray? Did you know that the barbs on a stingray are lined with venom glands!! Stingrays look like they can't do any damage but on their tails is a barb that can be lethal. Stingrays do have venomous tips, but it’s more accurate to say they have venomous barbed spines on their tails rather than “poison tips.” Here’s how it works: The Spine (Stinger): Most stingrays have one or more sharp, flat spines (called dermal denticles) on their tail.