The next zone is the dysphotic zone, which extends from about 50 meters, or wherever the euphotic zone ends, to about 1,000 meters. In this zone, there is enough light for organisms to see, but it is too weak for photosynthesis to happen. If we were to venture into the dysphotic zone, we could watch the visible light disappear as we traveled deeper. Once we reached the aphotic zone, there would be no light. This zone extends from about 1,000 meters depth to the ocean bottom. Animals in this zone are rare, but they do exist. Think about the thriving hydrothermal vent communities, which live and prosper without sunlight.