The smallest shark, a dwarf lantern shark (Etmopterus perryi) is smaller than a human hand. It's rarely seen and little is known about it, having only been observed a few times off the northern tip of South America at depths between 283–439 meters (928–1,440 feet). Like other lantern sharks, the dwarf lantern shark has light-emitting organs called photophores along its belly and fins. These help them camouflage when they feed in shallower water: the lit-up belly blends in with sunlight streaming down from above. In darker water, the light attracts smaller animals, which the shark preys upon. It also has big eyes (for a shark) to help it see in the mostly-dark waters of the ocean's twilight zone.