According to foreign media reports, a new study led by Duke University in the United States and published in Contemporary Biology pointed out that scientists have found 16 species of ultra-blackfish, which can absorb more than 99.5% of light, as if they are just shadows moving when swimming.
While light does not penetrate below 650 feet (about 198 meters) below sea level, some ultra-blackfish are able to survive 3 miles (about 4828 meters) below sea level, and they disguise themselves to escape prey.
Karen Osborn, a zoologist at the Smithsonian's National Museum of Natural History, said: "In the vast ocean, there are various crises, and the only option for some animals to survive is to become one with the environment. ”
The researchers note that the darkest species they found was a shorter angler than a golf club, which absorbed more than 99.5 percent of the light, with almost no light reflected back, and only 0.04 percent of the light.
Alexander Davis, a biologist at Duke University, said: "These anglers change the pigmentation of the skin through melanoids, which have been shown by computer simulations to have the best geometry for swallowing light." ”