Species include recognizable fish such as pelican eels, bobtail eels, and gulper eels. This includes deep-water anglerfish, gulper eel, amphipods and dragonfish. The umbrella mouth gulper is a deep sea eel with an enormous loosely hinged mouth. The gulper eel is one example of an organism that displays these characteristics. The gulper sharks like deep, murky waters. Longlines intended for other species can easily catch gulper sharks. Male gulper sharks tend to outnumber females 2&colon;1, which is common for many fish species. Other areas of gulper shark populations have no current regulations. On average, male gulper sharks are smaller than females. Human interaction with the gulper shark exists mainly in the form of fishing. However, gulper sharks are not always caught intentionally. Large populations of gulper sharks must be built over long periods of time. The life expectancy, longevity, of female gulper sharks ranges between 54 and 70 years. Away from the commercial side of conservation, there are tagging efforts to monitor gulper populations. Acceptable habitats for gulper populations are found globally, wherever temperate and tropical waters are found.