The mesopelagic zone is sort of the middle ground of the ocean. Located between 200 and 1,000 m (660 to 3,300 ft) in depth, it’s a region where only one percent of the ambient light reaches down. There isn’t enough light to support photosynthesis, but it’s still home to a surprising variety of life, including bristlemouths, blobfish, bioluminescent jellyfish, and giant squid.