Some of these photos are mine, others are ones I took from the ROV Oceanic Explorer 's camera monitor. Pelagic Zones 2. Vents and Seeps .
Life can be abundant, if nutrients and sunlight are plentiful.
Most animals have low-energy tissues and sluggish lifestyles to cope with low food energy, since no algae can grow, and life gets sparser the deeper one goes. These deep zones together form the largest habitat on earth and the least explored. Finally, the deepest tectonic trench is about 11,000m, with those habitats sometimes called Hadopelagic . Examples of deep pelagic animals are shrimp and anglerfish, though no fish has ever been seen or caught below 8,000m. The surface of most areas is mostly mud and organic ooze , though some bathyal slopes are rocky .