• Ocean Zones
  open ocean divided into benthic (floor) and pelagic (water) zones; pelagic divided into euphotic or sunlit zone; midnight zone divided into aphotic zone and abyss;
  in Public bookmarks with depth ecosystems light ocean_zones
• Oceans Alive!
  Life in the Sea. Explains five ocean zones based on life, light, and depth. Five are: epipelagic or sunlit zone; mesopelagic or twilight zone; bathypelagic or midnight zone; abyssal zone (pitch black); and hadal zone (deepest trenches)
  in Public bookmarks with depth life light ocean_zones

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