Greenpeace hopes this footage will encourages calls for a 1.8 million square kilometres sanctuary in the Antarctic Ocean in order to protect the vulnerable species that live in its waters.
Greenpeace's ongoing expedition is part of a campaign for the creation of a marine sanctuary in Antarctica encompassing some 700,000 square miles. Researchers explored the seafloor in pairs in a small submarine that also allowed them to take photos and videos of the seafloor.
During their survey of a previously undocumented portion of the Antarctic seabed, scientists were surprised by the amount of biodiversity.
"There were a lot of species of sponges, corals, sea squirts, a lot of different kinds of sea stars and their relatives, basket stars, feather stars".
"It was just incredible how the whole bottom was carpeted with life".
John Hocevar said: "I really didn't know what to expect, but we saw so much life, it was very diverse. I hope the work we're doing down here shows exactly why we need to protect this precious ecosystem", he added.
Susanne Lockhart, a research associate at the California Academy of Science who visited the seafloor in the submarine, said there are clear indications of a vulnerable marine ecosystem there.
A Greenpeace submarine returns to the surface near Livingston Island, Antarctica, following a dive to the sea floor.
It is due to be considered at the next meeting of the Antarctic Ocean Commission in October 2018.
Hocever and Lockhart both visited the remote seabed in a miniature, two-person submarine. Scientists are also measuring plastic pollution levels and detailing ecological vulnerabilities.
The sanctuary would provide a safe haven for species like penguins and whales, and "putting the waters off-limits to the industrial fishing vessels sucking up the tiny shrimp-like krill", according to Greenpeace.
The campaign will soon have a celebrity guest.
The campaign has already garnered worldwide attention with Stranger Things star David Harbour launching a twitter campaign to convince Greenpeace to let him join the expedition and "dance with the penguins".
"We challenged. And he delivered", Greenpeace said.
"We'll be doing further exploration of the bottom of the sea to help determine specific areas that should be a priority for protection from commercial fishing in these pristine waters, as well as building a body of evidence to support proposals for protection in the Antarctic Ocean".