Splash from a breaching humpback whale.

Johns Hopkins Glacier on right- Clark Glacier on left.

Glacially scoured landscape in Glacier Bay.

Riggs Glacier at the east end of Muir Inlet

A scoured valley - now an inlet in Glacier Bay.

Riggs Glacier at the east end of Muir Inlet

Riggs Glacier at the east end of Muir Inlet

Riggs Glacier at the east end of Muir Inlet

A humpback whale

Wrangell Narrows - the most "buoyed" passage in the world.

Wrangell Narrows - the most "buoyed" passage in the world.

JOHN N. COBB moored in Juneau during January cruise.

Juneau in the winter.

Juneau in the winter.

NMFS floating dock in Juneau.

JOHN N. COBB moored in Juneau during January cruise.

Breaking ice to moor in Little Port Walter in January.

Breaking ice to moor in Little Port Walter in January.

Chatham Strait in winter.

Little Port Walter in January at the salmon rearing pens.

Tied up and ready to offload cargo of fish food.

Hiking along the Mendenhall Glacier.

The edge of Mendenhall Glacier where the ice contacts the mountain. Many caves and wide gaps in this area.

An ice cave under Mendenhall Glacier.

An ice cave under Mendenhall Glacier.

An ice cave under Mendenhall Glacier.

Mendenhall Glacier.

An abrupt change in water characteristics at the point where glacial melt-water meets oceanic water. In Saginaw Channel.

Flowering plant in the Alaskan forest at Little Port Walter

A trail at Little Port Walter.

The JOHN N. COBB moored at Little Port Walter.

Lynn Canal

A sharp mountain peak with cloud formed by orographic lifting of the air. A view from Lynn Canal.

A sharp mountain peak with cloud formed by orographic lifting of the air. A view from Lynn Canal.

A mountainous passage.

Five Fingers Lighthouse in Frederick Sound.

Location unknown

Alaska mountains in May

A marine mammal observer at work on the JOHN N. COBB

Rugged Alaska mountains

Approaching Juneau from the south in Gastineau Channel

Approaching Juneau from the south in Gastineau Channel

Tied up alongside salmon-rearing pens for transfer of smolts to the JOHN N. COBB

Loading the salmon smolts aboard the JOHN N. COBB

Loading the salmon smolts aboard the JOHN N. COBB

Loading the salmon smolts aboard the JOHN N. COBB

Loading the salmon smolts aboard the JOHN N. COBB

A mountain lake loaded with rainbow trout - 2 miles up the trail from Little Port Walter.

Jonathan Blue, off the JOHN N. COBB, fishing for rainbow trout.

Killer whale study