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What are the creatures living in the deep sea?

The deep sea habitat is marked by the absence of light. At school, we learn that the food chain starts with plants, and that plants need light to grow. So, if you live in the dark depths of the ocean, where does your food come from? The simple answer is that it falls from above. Most life in the deep sea environment relies on various pieces of food to fall from the sunlit surface waters. This falling food can take many forms. Much of it falls as marine snow, tiny dead and rotting animals, fish scales, and varied poop.