In the early 1990s there were more than a thousand of the Cook Inlet's genetically distinct belugas.

ECONOMIST: Environment

This brings humpbacks, minkes and king-of-the-sea blue whales steaming through the area, as well as chatty white belugas, which otherwise are seen only in the Arctic.

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The future of the Cook Inlet belugas is caught between the competing, and sometimes conflicting, interests of environmentalists, conservation scientists, native Alaskans and economic developers.

ECONOMIST: Environment

The whales, known also as belugas, dived regularly to the bottom of Storfjorden, off the east coast of the main island of Spitsbergen, reaching areas it would have been difficult to monitor from a ship.

BBC: Whales probe Arctic fjord's secrets