New research reveals that orcas around the island of Hokkaido can be split into two distinct forms, offering conservationists important information that can help protect the animals.

A new species of killer whale has been discovered off the southern coast of Chile. Researchers from San Diego's Scripps Institution of Oceanography say the whales look distinctly different than orcas.

A rare and dramatic encounter with transient killer whales has been documented off the coast of Victoria, offering a glimpse ...

The species Orcinus orca, generally known as orcas or killer whales, is made up of many genetically distinct populations called ecotypes. Each ecotype indicates an ecological specialization with its ...

Almost the entire population of southern resident killer whales gathered in central Puget Sound on Sunday, but the newest member of J Pod, a newborn known as J64, was not among them. According to a ...

Whatever may be the driving force, killer whales’ use of tools is a remarkable discovery, especially when few animal species ...

The charismatic killer whale, or orca, is the totem species of northwest Washington and coastal British Columbia. This intelligent, social predator is known to form lasting social bonds and lives in ...

The orcas in tanks cannot be given back their lives. But the legal loopholes that put them there can absolutely be dismantled ...