Watch video footage of the intriguingly named stoplight loosejaw, Malacosteus niger, as its interesting features are discussed by James Maclaine, a fish curator at the Museum. Malacosteus niger is one of the most bizarre fishes ever discovered. Not only is it capable of producing both red and blue-green light, but it can also dislocate its head in order to lunge out with its lower jaw at prey (much like a dragonfly larva). Hence its common name, the stoplight loosejaw. It belongs in the family Stomiidae, also known as the dragonfishes.