A pod of endangered Southern Resident Killer Whales were spotted off the coast ... prey only on marine mammals like seals, sea lions, dolphins, porpoise, and baleen whale calves.

Scientists reveal that killer whales and dolphins have lost the ability to return to life on land. The ancestors of these sea creatures once walked along the shores, but those days will not return.

false killer whales are named for their skull shape, which resembles that of an orca, according to the International Whaling Commission. Measuring up to 20 feet long, the dolphins are social ...

Dolphins and pilot whales can tell which orcas are coming for them by listening to their calls. A series of rodent experiments showed that even with abundant food and water, personal space is ...

MONTEREY BAY, Calif. – A group of Southern Resident killer whales were spotted in Monterey Bay, California, on Tuesday in a rare spectacle of the endangered creatures. About 25 of the whales were seen ...

In the absence of their predator, the seals and other creatures have been going all out against their prey. In 2009, the orcas, or the killer whales, entered the region. They fed on common dolphins ...