The theme of this year’s World Oceans Day, which has been celebrated since 2008, is “Planet Ocean: Tides are Changing.”

In a message to mark World Oceans Day, UN Secretary-General António Guterres called for greater action to protect oceans and emphasized the need to put the ocean first today and every day.

Guterres said human-induced climate change is heating the planet, disrupting weather patterns and ocean currents, and altering marine ecosystems and the species living there.

Marine biodiversity is also under attack from over-fishing, over-exploitation and ocean acidification. Fish stocks are being depleted, and coastal waters have been polluted with chemicals, plastics and human wastes.