Etmopterus perryi, commonly known as the lanternshark, is a small species of shark found in the deep waters of the western Atlantic Ocean. It typically inhabits depths ranging from 200 to 1,000 meters. This species is notable for its bioluminescent properties, which allow it to produce light through specialized organs, aiding in camouflage and communication. The lanternshark grows to a maximum length of about 50 centimeters. It has a slender body with a dark coloration, often featuring light spots or patterns. Etmopterus perryi primarily feeds on small fish and invertebrates, playing a role in the marine ecosystem as both predator and prey.