The aphotic zone is the part of the ocean where sunlight does not penetrate, typically found at depths greater than 200 meters (656 feet). In this dark environment, photosynthesis cannot occur, making it challenging for most life forms to survive. The temperature is usually cold, and the pressure is high, creating a unique habitat for specialized organisms. Despite the lack of light, the aphotic zone is home to various creatures, such as deep-sea fish, squid, and bioluminescent organisms. These species have adapted to the extreme conditions, often relying on chemosynthesis or scavenging for food that sinks from the upper layers of the ocean.