Despite their underwater habitat, whales are mammals. Mammals are not solely terrestrial; some, including whales and dolphins, are fully aquatic the University of Michigan Museum of Zoology reports.

Orcas, also known as killer whales, are among the most well-studied marine mammals, captivating the public and scientists alike with their intelligence, strong social bonds and complex behaviors.

While orcas, also known as "killer whales," are a common sight in the northeast Pacific Ocean, they’re rarely detected in the ...

Conservative leaders feel they now have the political will to remove key pieces of the Marine Mammal Protection Act, enacted ...

Goose-beaked whales (Ziphius cavirostris) hold the record for deepest dive of any marine mammal, and researchers hope that examining how these animals manage their oxygen thousands of feet underwater ...

This visual guide explains the interactions that orcas, also known as killer whales, are having with ships and why scientists ...

Thirty beluga whales were still alive on Oct. 10, despite Canada's Marineland park threatening to euthanize them if it did ...