Fish facts from the bottom of the sea

The abyssal depths of seas and oceans are completely dark places where there is no light, hardly any oxygen, even plants - which are the main source of energy - hardly exist, and any non-predatory creature must live on the dead particles that sink to the bottom from The upper layers of the sea, and with all this, life there is more diverse than anywhere on the surface of the earth, and the harsh conditions there have led to strange developments and amazing mutations among the creatures of the abyssal depths.