Above and below view of an arch formed in an iceberg at Cuverville Island, Ererra Channel, Antarctica, Polar Regions

Underwater view of dense brash ice at Cuverville Island, Ererra Channel, Antarctica, Polar Regions

Above and below view of an arch formed in an iceberg at Cuverville Island, Ererra Channel, Antarctica, Polar Regions

Above and below view of an arch formed in an iceberg at Cuverville Island, Ererra Channel, Antarctica, Polar Regions

Above and below view of an arch formed in an iceberg at Cuverville Island, Ererra Channel, Antarctica, Polar Regions

Underwater view of dense brash ice at Cuverville Island, Ererra Channel, Antarctica, Polar Regions

Above and below view of an iceberg at Cuverville Island, Ererra Channel, Antarctica, Polar Regions

Adult gentoo penguins (Pygoscelis papua) leaping off ice shelf onto rocky shoreline in the Ererra Channel, Antarctica

An adult leopard seal (Hydrurga leptonyx) hauled out and resting among the icebergs in the Ererra Channel, Antarctica

An adult leopard seal (Hydrurga leptonyx) hauled out and resting among the icebergs in the Ererra Channel, Antarctica

Adult gentoo penguins (Pygoscelis papua) in the Ererra Channel, Antarctica