We depend on the oceans for the food we eat, for transportation and, of course, they enable us to take part in the water sports and activities we love.
Over 90% of the earth's plants and animals - from tiny plankton to the mighty blue whales - live in and depend on the seas and oceans.
Marine plants produce at least half of the oxygen in the atmosphere and the oceans absorb a quarter of the carbon dioxide. This regulates the climate helping to prevent the earth from overheating.
More than 2½ billion people in the world depend on fish for at least 20 percent of the protein they consume, and more than 200 million jobs are related to fisheries.
The seas are threatened by:
Unsustainable fishing that has brought once common species to the edge of extinction.
Chemical pollution from agriculture, shipping, oil rigs and factories.
Discarded plastic that doesn’t biodegrade in water. It kills thousands of mammals, birds and fish that eat it mistaking it for food or become entangled in it.
Rising water temperatures that are making the seas more acidic. Scientists think this may damage coral reefs and shelled marine creatures such as oysters, clams and sea urchins.
The oceans are becoming less able to absorb CO2 affecting their ability to moderate our climate.
Put simply: the seas and oceans and the life within them are running out of time; and this is a major issue not just for marine species but also for humanity.
Check out this infograph for more.