Mitsuaki Iwago / Arctic Tern (Sterna paradisaea) flying overhead, Arctic

Flip Nicklin / Ringed Seal (Phoca hispida) at breathing hole, Arctic

Norbert Wu / Ctenophore (Beroe cucumis) voracious, large mouth, Arctic

Ingrid Visser / Black Guillemot (Cepphus grylle) resting on rocks, Arctic

Flip Nicklin / Arctic Copepod group swimming, Arctic

Flip Nicklin / Inuit guide and film crew ferrying supplies and snowmobiles on icefloe, Arctic

Flip Nicklin / Bioluminescent zooplankton, Arctic

Flip Nicklin / Bioluminescent zooplankton, Arctic

Norbert Wu / Lion's Mane (Cyanea capillata) jellyfish bell can reach three meters in diameter and weigh one ton, Arctic

Norbert Wu / Comb Jelly (Mertensia ovum) with tentacles withdrawn to lick clean, Arctic

Norbert Wu / Atlantic Longfin Squid (Loligo pealii) mid-water trawl, Arctic

Norbert Wu / Constricted Jellyfish (Catablema vesicarium) tiny jellyfish, Arctic