Cnidarians sting their prey primarily for feeding purposes and self-defense. The stinging cells, called cnidocytes, contain tiny harpoon-like structures called nematocysts, which release venom when triggered. When a prey comes in contact with the cnidarian's tentacles, the nematocysts discharge venom, immobilizing or killing the prey. This allows the cnidarian to consume the prey and obtain necessary nutrients for survival. Stinging also serves as a defense mechanism, as it helps to deter potential predators or threats. Overall, the ability to sting provides a competitive advantage for cnidarians in their environment.
