Cnidocytes are specialized cells found in cnidarians, such as jellyfish, sea anemones, and corals. These cells contain tiny, stinging structures called nematocysts, which can inject toxins into prey or potential threats. When triggered, a nematocyst rapidly fires, allowing the cnidarian to capture food or defend itself. The presence of cnidocytes is a key feature that distinguishes cnidarians from other animal groups. These cells play a crucial role in the survival of these organisms, enabling them to thrive in various aquatic environments. Understanding cnidocytes helps scientists learn more about the complex interactions within marine ecosystems.