The mesopelagic zone, also known as the twilight zone, is a layer of the ocean that extends from about 200 meters to 1,000 meters below the surface. This zone receives limited sunlight, making it difficult for photosynthesis to occur. It is home to various marine life, including squid, fish, and zooplankton, which have adapted to the low-light conditions. In the mesopelagic zone, temperatures are cooler, and pressure increases with depth. This area plays a crucial role in the ocean's ecosystem, as it serves as a migration route for many species, including the lanternfish, which is one of the most abundant fish in the world.