Greenpeace volunteers perform an 'ocean wave' while painted blue during an event in the lead-up to World Oceans Day, at the Byblos Citadel in Byblos, Lebanon.

From Santiago to Bangkok, London to Johannesburg, Greenpeace volunteers and supporters create human waves across 23 countries to call for the protection of our seas and the creation of a network of ocean sanctuaries covering 30% of international waters by 2030.