Dragonfish inhabit open ocean waters between 1000 m-3000 m deep. Some Dragonfish come to the surface at night to feed although others stay in waters about 5000 m deep. Common characteristics of the Dragonfish include large hinged teeth, light organs on barbells below the jaws or on the pectoral fin, also lines of light organs along its body. The bones in its body are smaller but the jawbones are heavily reinforced as well as being recurved. The Dragonfish also has a second set of jaws deep in its oral cavity. Its skull is mostly cartilage and has very thin bones. Dragonfish are just another example of how well animals can adapt to harsh environments.