A small pod of Type B killer whales (Orcinus nanus) just outside Duse Bay in the Weddell Sea, Antarctica, Polar Regions

killer whales orcinus nanus pod surfacing weddell sea antarctica marine life polar regions cetaceans ocean wildlife nature underwater fins behavior swimming mammals sea environment arctic blue water group adventure natural habitat marine ecosystem dolphins creature exploration research conservation marine biology oceanography aquatic life wildlife observation natural world animal behavior sea creatures waves sea surface polar climate biodiversity natural sciences ecosystem conservation animal tracking field study habitat protection species observation