Video still of sponges, coral and diverse invertebrate community seen during a submersible dive in the Active Sound, Antarctica.

The Greenpeace ship Arctic Sunrise has returned to the Antarctic Peninsula with scientists Susanne Lockhart and Rachel Downey for a series of dives with a submersible to explore the sea floor.

Greenpeace is conducting scientific research and documenting the Antarctic’s unique wildlife, to strengthen the proposal to create the largest protected area on the planet, an Antarctic Ocean Sanctuary.