Antarctic petrels pictured at the stern of a krill fishing vessel, at the South Orkney Islands, Antarctica.

The Greenpeace ship Esperanza is on the final leg of the Protect the Oceans voyage from the Arctic to the Antarctic. The almost year-long voyage is one of Greenpeace’s biggest ever expeditions and highlights the many threats facing the oceans while campaigning for a Global Ocean Treaty covering all seas outside of national waters.