Oceans contain the greatest diversity of life on Earth. From the freezing polar regions to the warm waters of the tropics and deep sea hydrothermal vents to shallow seagrass beds, marine organisms abound. Humans rely on the oceans for their important natural resources. Fishing is the principal livelihood for over 200 million people and provides the main source of protein for more than a billion.
Overexploitation of fish and other resources, destructive fishing, unregulated development, pollution and climate change are altering oceans in numerous ways. Human impacts can be found even in remote areas, such as the middle of the Pacific where plastic garbage accumulates. WWF works around the world to protect oceans and the variety of species and communities that depend on them.
An amazing collection at: https://worldwildlife.org/habitats/oceans