Bella Thorne channels a suffering killer whale in a PETA ad for the annual Boycott SeaWorld Day, which is on Tuesday. In the photo, the 20-year-old actress appears as an orca mermaid, with her ...

Killer whale punts a sea lion 20 feet in the air to show calf how it’s done A killer whale calf that is several months old swims with an adult in its pod during a hunting session.

Whale sharks are gentle, filter-feeding giants, but orcas in Mexican waters were documented attacking the animals and devouring their livers.

The whales use quick body movements to tear pieces of bull kelp for use as tools, perhaps the first known toolmaking by a marine mammal.

There's a new member of the Southern Resident killer whale family, a species that's fighting extinction with less than 100 known creatures in existence. Tahlequah, an orca that grabbed the nation ...

Divers captured the shocking footage of an orca tearing a shark open and "slurping" out its liver, a hunting technique that is rarely observed by humans.

A famous white orca called "Frosty" was seen this week by a whale-watching tour group off the coast of Newport Beach in California.

Sea World killer whale Tillikum broke trainer Dawn Brancheau's jaw and vertebra, and dislocated an arm and a leg while thrashing her around, an autopsy has concluded.

A female trainer was killed by a 12,000 pound killer whale at Sea World's Shamu Stadium in Orlando, Fla., according to police and local media. The whale responsible for the attack is named Tilikum ...

Kohana's death marks the third killer whale to die at the Loro Parque marine park in Tenerife, Spain in the past 18 months.

SeaWorld points out that it hasn’t removed a killer whale from the oceans in more than 35 years. It has successfully bred 31 orcas in captivity since the mid-1980s.