[https://www.ndtv.com/offbeat/scientists-unravel-secrets-of-ultra-black-fish-that-live-in-the-deep-sea-2264515](https://www.ndtv.com/offbeat/scientists-unravel-secrets-of-ultra-black-fish-that-live-in-the-deep-sea-2264515) >"For fish inhabiting the immense darkness of the deep sea, being ultra-black offers great camouflage in a fish-eat-fish world. Scientists studying some of these exotic creatures now have unraveled the secret behind their extreme color."