orca

Knock-on effects of melting sea ice in the Arctic may be to blame for a spate of gray whale deaths along their migration route from Mexico to Alaska.

For the past two years, the charismatic marine mammals have washed up on Pacific shores in record numbers. Scientists investigating the strandings suspect warming waters and melting sea ice are partly to blame.

Post-menopausal orcas tied to an increase in calf survival by providing food, care, and guidance.

These Type D killer whales have blunter heads and a different color pattern than other orcas. A new species designation hinges on the results of genetic testing.

PCBs persist in the environment and accumulate in killer whales, driving their numbers down.

Meet some of the people featured in the July/August 2018 issue of The Scientist.

In Chapter 15, author Jason Colby describes a scene of captive orca release and early research into the species' behavior and social organization

Organophosphates jeopardize dozens of species, a federal review finds.

A cetacean succumbed to a fungal infection shortly after being darted by researchers seeking to learn more about the species’ migrations and population dynamics.

What researchers are learning as they sequence, map, and decode species’ genomes