New Delhi | Jagran News Desk: Seas and oceans have always intrigued mankind, forcing people to explore them. People across the world always get excited while exploring the unfamiliar waters of the deep sea. In deep sea, being ultra-black offers great camouflage for fishes which help them from predators as it offers insurmountable degree of camouflage. However, the secret behind their extra ordinarily black skin colour is no more a secret, thanks to the research put forth by Washington’s National Museum of Natural History.

According to the study, such ultra-black fishes, fangtooth, the Pacific blackdragon, the anglerfish and the black swallower, over the course of evolution have developed themselves in such a way that they reflect less than 0.5% of the light that hits their bodies.

The group of scientists studied six different Orders of aquatic animals – large group of similar organisms with same ancestor – and found that there are a total of sixteen species that could be defined as ultra-black.

“In the deep, open ocean, there is nowhere to hide and a lot of hungry predators,” said zoologist Karen Osborn of the Smithsonian Institution, at Washington’s National Museum of Natural History, a co-author of the research published in an acclaimed journal Current Biology, while adding that, “An animal’s only option is to blend in with the background.”

Moreover, the degree of light that goes beyond 200 meters (or 650 feet) below the surface of Ocean is ‘very little’. And these Orders of Aquatic organisms, live at around five kilometers below the surface of Ocean.

The researcher Karen Osborn discovered that the skin of some of these aquatic organisms are comprised of the blackest known material. And these in-fact lures the other less black organisms into their preying surroundings.

The colour inducing Melanin pigment is abundant in skin, but over the course of evolution, its distribution has become uneven, to give such organisms a preying advantage.

“This mechanism of making thin and flexible ultra-black material could be used to create ultra-black materials for high-tech optics or for camouflage material for night ops,” Osborn was quoted as saying.

Posted By: Abhinav Gupta