The deep sea is a very inhospitable place with no light and barely any oxygen in the water. The plant life, which is the primary energy producer, is virtually non-existent. Anything that is not a predator has to live on dead particles drifting down from the top layers of the sea. Yet life thrives there far more diverse and numerous than anywhere else on Earth. The extreme conditions of deep sea have led to extreme evolution and bizarre characteristics. Here are some facts about deep-sea creatures that illustrate the strangeness of life at extreme depths. 1. There is a fish called the Atlantic wolffish which produces its own antifreeze to keep the blood flowing. Atlantic wolffish are primarily found in the east and west coasts of the Atlantic. They love cold waters at depths of 20 to 500 meters (66 to 1,640 feet) at temperatures -1 to 11 degrees centigrade (30 to 52 degrees Fahrenheit). As they live in near-freezing temperatures, they can naturally produce antifreeze t...