Narcin is a toxic protein found in the venom of certain species of cone snails. It is primarily known for its ability to affect the nervous system of prey, leading to paralysis. This protein works by blocking specific ion channels, which disrupts normal nerve signaling and can be lethal to small marine animals. Research into narcin has potential implications for medicine, particularly in pain management and neurological disorders. Scientists are studying its mechanisms to develop new treatments that could mimic its effects without the associated risks of toxicity. Understanding narcin could lead to breakthroughs in how we approach pain relief and nerve-related conditions.