A cnidocyte is a type of cell containing a large secretory organelle called a cnidocyst, that can deliver a sting to other organisms as a way to subdue prey and defend against predators. A cnidocyte e
Nomarski micrograph of a ruthenium red-stained nematocyst from Aiptasia pallida, the pale anemone. The red dye stains the polyanionic venom proteins found inside the capsule of this partially-discharged nematocyst.