Dragonfish, also known as deep-sea dragonfish, is a unique fish species that lives in the deep ocean waters. There are several synonyms for dragonfish that describe its unique features and behavior. The term "viperfish" is often used because of its sharp teeth and resemblance to a snake. "Anglerfish" is another synonym that refers to its bioluminescent lure, which it uses to attract prey. "Gulper eel" also describes this fish due to its large, expandable mouth. "Black dragonfish" is another popular synonym that highlights its dark coloration, making it harder to detect in the deep waters. "Sloane's viperfish" is a specific type of dragonfish named after a naturalist who first discovered it.