[raybbr]

They dive deeper and longer than any other marine mammal and spend an estimated 92 percent of their lives far beneath the ocean surface. One species, the True's beaked whale, is so rare that only a handful of people have ever seen it alive.

They have all the info on a mammal that nobody's ever really seen? How is that?

[C19fan]

Most of the information is from carcasses that come ashore and the rare times some of these animals have been tagged.

[jjotto]

Whales get stranded as well as getting caught in fishing nets. Plenty of examples of the various species of beaked whales have been examined up close.