††††††† The Hadal zone is made up of the very deepest parts of the
ocean, causing it to be totally dark, and constantly cold, with a very intense
pressure.† You may think that the Hadal
zone is lifeless, due to the conditions, but it was proven that there was life
when Jaques Piccard and Don Walsh reached the
††††††† The deep-sea creatures have adapted to the darkness by reducing their use of eyesight.† The fish do have eyes, though, and they are usually enormous, which indicates enough flashes of bioluminescent light to keep their eyes from totally deteriorating.† The animals that live near the bottom have a reddish or pinkish coloration, possibly because the red light waves are absorbed in the topmost layers of the ocean.† So the creatures donít look any different than the black ones with no red light to be reflected!