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Deep Resident

There are an untold number of species like this jelly that are residents of the ocean’s twilight zone. The region of the ocean between 200 and 1,000 meters (660 and 3,300 feet) around the world may contain more biomass than all the rest of the ocean combined. WHOI scientists, engineers, and policy experts have launched a comprehensive effort  to study the global twilight zone before fishing operations can adversely affect the region’s role in marine food webs and in Earth’s global climate system. (Photo by Larry Madin, Woods Hole Oceanographic Institution)