Blackout :)

 One specimen of the ultrablack fish species Anoplogaster cornuta. A unique arrangement of pigment-packed granules enables some fish to absorb nearly all of the light that hits their skin,

so that as little as 0.05 percent of that light is reflected back.

Going ultra black in the abyss pays off, not only in terms of avoiding predators but also to remain hidden when presenting bioluminescent lures to attract prey within striking distance. Vantablack's living rival rules.

"In pretty much all ultra-black materials you need both scattering and absorption," said co-author Alexander Davis, a graduate student at Duke. "In all other animals that we know of, the scattering in ultra-black coloration comes from either a chitin or keratin matrix, like a bird feather or butterfly scale, and the absorption comes from melanin embedded within those matrices. In these fishes, the scattering and absorption are both coming from the melanosomes themselves. This makes the mechanism a bit simpler because there is no structural scaffold necessary."

Several ultrablack species seem to have independently evolved the exact same adaptation; Osborn and her colleagues found these pigment patterns in 16 distantly related species.

The Pacific black dragon has a bioluminescent lure that they use to attract prey, and
if not for their ultrablack skin and transparent, anti-reflective teeth, the reflection
of their lure would scare prey away.

Vantablack in action ...

Vantablack is the brand name for a new class of super-black coatings.
The coatings are unique in that they all have hemispherical reflectances
below 1% and also retain that level of performance from all viewing angles. 

Have to show a closeup. :)

The Pacific blackdragon also has light-producing organs below their eyes that scientists expect might be used as a searchlight to spot prey.