At birth, beluga whales are 5 feet long, roughly 100 pounds, and dark blue-gray in color. Unmistakable as adults, their color lightens to white, and they have a dorsal ridge rather than a fin. Belugas ...

Whale shark with injury to the dorsal fin, likely to be caused by collision with a vessel. Credit: Gonzalo Araujo ...

At birth, beluga whales are 5 feet long, roughly 100 pounds, and dark blue-gray in color. Unmistakable as adults, their color lightens to white, and they have a dorsal ridge rather than a fin. Belugas ...

Orcas kept in captivity were known to suffer from physical and psychological issues, including developing the hallmark collapsed dorsal fin ... "retired" captive beluga whales, Groves said.

Here’s a summer “staycation” idea: From the comfort of your own home, you can watch—and listen to—tens of thousands of beluga whales ... Instead of a dorsal fin, belugas have a dorsal ...