Researchers documented 34 instances of purported prey-sharing behavior, which suggests orcas may be altruistic and capable of ...

Scientists say they discovered that two well-known types of killer whales in the North Pacific Ocean are actually two separate species and not just different races. In a study published Wednesday ...

After 20 years of suspicions, new research demonstrates two types of orcas living along the Pacific Coast are actually different species.

There are 10 different types around the world. Moms are pregnant a long time. ... Killer whales are among the fastest swimming marine mammals and can reach speeds over 30 mph for short distances.

Orcas have a diverse diet and hunt for many different types of food. According to National Geographic , they hunt for fish, walruses, seals, sea lions, penguins, squid, sea turtles, sharks and ...

There are at least three different types of killer whales that are known to swim through California’s waters: transient, offshore and resident whales. Transients and residents tend to keep close ...

Scientists say they discovered that two well-known types of killer whales in the North Pacific Ocean are actually two separate species and not just different races. In a study published Wednesday ...

The data suggests that the Bigg’s killer whales branched off from other orcas between 200,000 and 300,000 years ago. The residents, for their part, diverged from other orcas about 100,000 years ago.