Where the light of the sun does not penetrate the ocean water anymore it becomes dark, very, very dark. In this darkness it also becomes cold, there is low oxygen, little nutrition, and hundreds of bars of pressure. Yet, there are some fish that have completely adapted to this harsh world. They have adapted in such way that they can swim around and even find their food. All with their own unique style, some even a bit creepy, but hé it works ;)!