Idiacanthus antrostomus

Idiacanthus antrostomus, also known as the Pacific blackdragon or black sea dragon, is a species of barbeled dragonfishes noted for having ultrablack skin, similar to pigments like Vantablack.

The fish has tightly packed melanosomes allowing its skin to absorb 99.95% of light of wavelengths common in its habitat.

It has been found at depths between 500 m and 2000 m along the West Coast of the United States and in the Gulf of Mexico.