Deep Seas Nature's Microworlds : Season 2 Episode 5

Steve's team investigates the world's largest, yet still largely badly studied biotope by far: the deep ocean parts. For more life then expected dwells at different levels, even the dark where many generate their own light, mostly feeding on a long recycling chain of food grown under sunlight and decomposing at sea. However exceptionally rich wildlife concentrations are found in the most inhospitable parts of the sea surface, toxic zones around volcanic eruptions, where specialized bacteria form the part of a surreal food chain.