Born a Male, Die a Female The elongated bristlemouth, Gonostoma elongatum, has a long, slender body and a large mouth with fang-like teeth. With glowing, bioluminescent scales, Compton described the fish as "4-inch replica strips of The Strip at Las Vegas." The species is even more notable for its gender-bending life cycle. All bristlemouths are born as males, but they eventually transform into females later in their lives.
The Pacific blackdragon is a deep sea fish, that can be found up to depths of up to 3,300 ft. Female blackdragons are about two feet long and have fang like teeth and a long chin whisker. They are black on the outside, aswell as on the inside to prevent light from swallowed bio-luminescent prey shining out. The males are small, about three inches in length, and brownish in color. They have no teeth, no chin barbel and no stomach. Unable to eat, the male lives only long enough to mate.
The humpback anglerfish or common black devil, Melanocetus johnsonii, is a deep-sea anglerfish in the family Melanocetidae, found in tropical to temperate parts of all oceans at depths of up to 2,000 meters (6,600 feet). Its length is up to 3 centimeters (1.2 inches) for males and up to 20 centimeters (8 inches) for females.