Jordi Chias / Black rockcod (Notothenia coriiceps), Antarctic Peninsula, Antarctica.

Jordi Chias / Rock cod (Notothenia) Antarctic Peninsula, Antarctica.

Jordi Chias / Black rockcod (Notothenia coriiceps), Antarctic Peninsula, Antarctica.

Jordi Chias / Fish (Notothenia) Antarctic Peninsula, Antarctica.

Pascal Kobeh / Marbled rockcod (Notothenia rossii) Bellingshausen Sea, Antarctic peninsula.

Norbert Wu / Orca (Orcinus orca) travels down opening leads of ice, making deep dives under ice to hunt Antarctic cod, McMurdo Sound, Antarctica, sequence 2 of 4

Norbert Wu / Orca (Orcinus orca) travels down opening leads of ice, making deep dives under ice to hunt Antarctic cod, McMurdo Sound, Antarctica, sequence 1 of 4

Norbert Wu / Antarctic Cod (Dissostichus mawsoni) studied by researchers at the U.S. Base at McMurdo Station, Antarctica

Norbert Wu / Orca (Orcinus orca) surfacing at edge of ice, makes deep dives under ice to hunt Antarctic cod, Antarctica

Norbert Wu / Orca (Orcinus orca) pod resting at end of lead of ice, make deep dives under ice to hunt Antarctic cod, Antarctica

Norbert Wu / Orca (Orcinus orca) travels down opening leads of ice, making deep dives under ice to hunt Antarctic Cod, McMurdo Sound, Antarctica, sequence 4 of 4

Norbert Wu / Orca (Orcinus orca) travels down opening leads of ice, making deep dives under ice to hunt Antarctic Cod, McMurdo Sound, Antarctica, sequence 3 of 4