Pancake ice, South Shetland Islands.

A female Antarctic fur seal calls to her pup. Antarctic fur seals locate and identify their pups by calling and listening for a response. They also use olfactory (smell) cues.

Gentoo penguins and fur seals at Livingston Island.

Deploying an IKMT net from the stern of the R/V Moana Wave.

Southern elephant seals and chinstrap penguins at the Seal Island field camp. Scientists lined blue barrels in front of their camp to keep the elephant seals from regularly crushing the tent.

An observation shack at a chinstrap penguin colony on Seal Island.

A macaroni penguin with chinstrap penguins at Seal Island.

A crabeater seal hauled out on an ice floe.

This stove at the Seal Island field station was used for cooking and warmth.

Calanoides acutus, an Antarctic copepod.

Champsocephalus gunnari, larval stage.

An Antarctic sunset.

A flock of cape petrels fly by a rugged Antarctic Island at sunset.

Chaenocephalus aceratus, an Antarctic icefish.

Chionodraco rastrospinosus, an Antarctic icefish.

Clio pyramidata, a pelagic snail.

A naked sea butterfly, Clione limacina.

Dissostichus mawsoni, a species of toothfish.

Electrona antarctica, a myctophid fish.

Antarctic krill, Euphausia superba.

Lepidonotothen nudifrons, or yellowfin notie.

Limacina helicina, an Antarctic pteropod.

Notothenia rossii, marbled rockcod.

Parachaenichthys charcoti, "Charcot's dragonfish".

Pseudochannichthys georgianus, a species of Antarctic icefish.

Themisto gaudichaudii, an Antarctic amphipod.

Trematomus eulepidotus, blunt scalyhead.

Trematomus scotti, crowned rockcod.

Trematomus scotti, crowned rockcod.

Mountain ridge, King George Island, 2009.

An adult Adelie penguin, with a flipper tag, stands next to an Adelie chick.

Chinstrap penguin parent with two chicks.

AMLR scientists peer over the bow as their ship slowly pushes through a layer of pancake ice.

Adult gentoo penguin feeds its chick regurgitated krill.

Melting glacial ice.

Young male Antarctic fur seal, Cape Shirreff, Livingston Island.

Playful Antarctic fur seal pup.

A wandering albatross glides over the sea on a calm day in the Southern Ocean.

A mountain almost buried by a glacier.

During rough seas, waves crash over the side of the R/V Moana Wave flooding the stern of the ship. Scientists and crew prepare for inclement weather by securing everything on the aft deck.

The AMLR crew on the stern of the R/V Yuzhmorgeologiya.

A CTD rosette is deployed to collect water samples.

A net is deployed to collect zooplankton samples.

An iceberg with visible striations, South Shetland Islands, Southern Ocean.

Penguins cling to the side of an iceberg.

AMLR crew maneuvers water-collection equipment.

AMLR crew members lower equipment into the frigid ocean.

Antarctic fur seal pup in the snow.

AMLR scientist Kim Dietrich records zooplankton data .

A resting Weddell seal.