This is the top layer of the ocean, nearest the surface. The open ocean is vast. Although food can sometimes be hard to find, many animals, such as dolphins, seals, and turtles, live there.
Many open ocean organisms live out their existence without ever coming into contact with the shore, the seafloor, or the water’s surface. They spend their entire lives surrounded by water on all sides and do not know that anything else even exists. In the case of the deep open ocean, organisms never even see sunlight. As land mammals that breathe air, walk on land, and rely on our sense of sight for almost all functions, it is difficult for people (even experts) to comprehend that most of the organisms on the planet are never exposed to air, land, or sunlight.
Picture Credit : Google