Deep-sea ceratioid anglerfish
This beautiful adult female is a whopping three inches long (a biggie for a ceratioid). She has a glowing lure, a modified dorsal-fin spine, that produces light due to bioluminescent bacteria. Male ceratioids are much smaller and are not bioluminescent. Once males cling onto a female, they become essentially parasitic, serving as an attached gonad. This lady was found at 950 meters off the Hele Islands, Solomon Islands, as part of the American Museum of Natural History's Explore 21.