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  • Ocean Zones - Woods Hole Oceanographic Institution
    The ocean water column is made up of five zones: the sunlight (epipelagic), twilight (mesopelagic), midnight (bathypelagic), abyssal (abyssopelagic) and hadal zones (trenches)
  • Sunlit Zone - Woods Hole Oceanographic Institution
    The upper layer of the ocean is known as the sunlit, or euphotic, zone Because water strongly absorbs light, sunlight penetrates only to depths of about 200 meters (656 feet)
  • Midnight Zone - Woods Hole Oceanographic Institution
    The midnight zone, or bathypelagic, extends to about 4,000 meters (about 13,100 feet), which reaches the ocean floor in many places is in perpetual darkness
  • Marine Protected Areas - Woods Hole Oceanographic Institution
    Marine protected areas refers to any part of the ocean that receives some level of protection under international, federal, state, local, or tribal law, protecting about one percent of the global ocean
  • Twilight Zone - Woods Hole Oceanographic Institution
    Why is the ocean twilight zone important? The ocean twilight zone provides important ecosystem services, including supporting ocean food webs and commercial fisheries, and transferring carbon dioxide to the deep ocean How does the twilight zone support ocean food webs? The abundance of life in the twilight zone supports a complex food web with connections to both the deep ocean and the
  • Why are oceans labeled separately as different bodies of water when . . .
    For example, in the North Atlantic Ocean there is the North Atlantic subtropical gyre and the North Atlantic subpolar gyre The connections between different regions in the oceans affect everything from biology to climate so it’s important that we have tools to study the ocean and ways of communicating that account for this interconnectedness
  • Oxygen Dead Zones - Woods Hole Oceanographic Institution
    Low-oxygen “dead zones” and phytoplankton blooms like those shown here extending into the Gulf of Mexico are expanding in the global ocean due to a variety of factors, including climate disruptions, warmer ocean temperatures, and increasing nutrient runoff from fertilizers and wastewater on land (Image courtesy of the National Atmospheric and Oceanic Administration)
  • Seamounts - Woods Hole Oceanographic Institution
    At mid-ocean ridges, plates are spreading apart and magma rises to fill the gaps Near subduction zones, plates collide, forcing ocean crust down toward Earth’s hot interior, where this crustal material melts, forming magma that rises buoyantly back to the surface and erupts to create volcanoes and seamounts
  • Abyssal Zone - Woods Hole Oceanographic Institution
    The abyssal zone, or the abyss, is the seafloor and water column from 3,000 to 6,500 meters (9,842 to 21,325 feet) depth, where sunlight doesn’t penetrate
  • Ocean Learning Hub - Woods Hole Oceanographic Institution
    Discover the Ocean Learning Hub—your gateway to trusted ocean science content Easily explore by topic, media type, grade level, and educational standards





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