Deep-sea ecology studies the complex interactions of organisms living in the ocean's depths, typically below 200 meters. This environment is characterized by extreme conditions, including high pressure, low temperatures, and complete darkness. Organisms here have adapted unique features, such as bioluminescence, to survive and communicate in the absence of sunlight. The deep sea is home to a diverse range of species, including deep-sea fish, crustaceans, and benthic organisms like sea cucumbers. These creatures play vital roles in nutrient cycling and energy transfer within the ecosystem. Understanding deep-sea ecology is crucial for conservation efforts and managing the impacts of human activities, such as deep-sea mining and overfishing.