The Sawyer Glacier, a tidewater glacier at the end of Tracy Arm in Southeast Alaska, USA.

The face of the Sawyer Glacier, a tidewater glacier at the end of Tracy Arm in Southeast Alaska, USA.

A very unusual iceberg calved from the Sawyer Glacier in Tracy Arm in southeast Alaska, USA.

Two Harbor Seals (Phoca vitulina) resting on ice calved from the Sawyer Glacier, a tidewater glacier at the end of Tracy Arm in Southeast Alaska, USA.

Working a boat through the ice of the Sawyer Glacier, a tidewater glacier at the end of Tracy Arm in Southeast Alaska, USA.

A very unusual iceberg calved from the Sawyer Glacier in Tracy Arm in southeast Alaska, USA.

Curious harbor seal (Phoca vitulina) swimming amongst ice calved from the Sawyer Glaciers in Tracy arm, Southeast Alaska, USA. Pacific Ocean.

Harbor Seal (Phoca vitulina) mother on ice calved from the Sawyer Glaciers in Tracy arm, Southeast Alaska, USA. Pacific Ocean.

Adult harbor seals (Phoca vitulina) hauled out on ice calved from the Sawyer Glacier in Tracy Arm, Southeast Alaska, USA.

The face of the Sawyer Glacier, a tidewater glacier at the end of Tracy Arm in Southeast Alaska, USA.

Harbor Seal (Phoca vitulina) mothers and pups on ice calved from the Sawyer Glaciers in Tracy arm, Southeast Alaska, USA. Pacific Ocean.

Harbor Seal (Phoca vitulina) mother and pup on ice calved from the Sawyer Glaciers in Tracy arm, Southeast Alaska, USA. Pacific Ocean.

Icebergs calved off the Sawyer tidewater Glacier in Tracy Arm, Southeast Alaska, USA.