Sunlight penetrates no farther than a few hundred feet down, leaving the deep-sea floor as dark as the deepest cave. With no sunlight, there are no plants; all vent life belongs to the animal kingdom.
Organisms in the deep sea rely on gravity flows to lay down sediment and then make burrows beneath the seafloor, according to ...
Scientists found deep-sea shrimp evolved special vision to detect bioluminescent light and navigate their world.