Deep-sea ecosystems are unique environments found at depths greater than 200 meters in the ocean. These areas are characterized by extreme conditions, including high pressure, low temperatures, and complete darkness. Despite these challenges, a variety of organisms thrive here, such as deep-sea fish, crustaceans, and bacteria, which have adapted to survive in such harsh conditions. One of the most fascinating features of deep-sea ecosystems is the presence of hydrothermal vents. These vents release mineral-rich water, supporting diverse communities that rely on chemosynthesis instead of sunlight for energy. Organisms like tube worms and giant clams form symbiotic relationships with bacteria, showcasing the complex interactions that occur in these remote habitats.