Orca

The population of Southern Resident killer whales who live off the waters of the northeastern portion of North America stands at 74 whales after the disappearance and presumed death of a male in the summer.

The orca, named T146D, was reported to be 20 foot long and let out five calls when rescuers sprayed it with seawater.

Taking shifts, teams of local volunteers have been braving frigid weather to care for the stranded calf 24 hours a day.

A group of orcas have been spotted chasing and lunging after an otter in the North Sea.

"We see orca quite a bit but they don't tend to accidentally end up getting caught out," British Divers Marine Life Rescue Area Coordinator Emma Neave-Webb told Newsweek.

Erik Martinez and Tyler Jackson got more than they bargained for when they went rock fishing over Thanksgiving weekend.

Three young orcas have been targeting yachts along the coasts of Spain and Portugal since the summer.

The baby is thought to have been playing with a buoy and craypot line when it got tangled.

The attack took place off the coast of Portugal and is the latest in a string of similar incidents.

Researchers say three whales were responsible for more than 60 percent of recent attacks.

After reviewing footage of the attacks, researchers found two of the orcas involved were seriously injured.

Marine biologist describes injuries sustained by the sharks in South Africa after being hunted by orca.

Orcas are known to kill great whites and eat their livers.

Natalie Kepa panicked when she saw "this big black fin" veering near her daughter while they were on holiday in New Zealand's Marlborough region.

Orcas were dubbed killer whales after ancient sightings of them ganging up against other (frequently larger) whale species. More recently, they have also been known to attack and kill great white sharks.

Close to 20 orcas have been seen in Puget Sound since Friday and approximately 40 were sighted in the Strait of Juan de Fuca on Saturday.

"When confronted by orcas, white sharks will immediately vacate their preferred hunting ground and will not return for up to a year."

NOAA experts say the new ocra species could be the "largest undescribed animal left on the planet."

Organization offers to provide heating guns to make sure the water temperature is not too cold.

The whale's pod hasn't had a single viable pregnancy over the past three years.

A group of Native Americans with a deep spiritual connection to the animal are offering assistance.

It could be the oldest image ever recorded at the desert site.

This is the first time orcas have been blamed for killing great white sharks off South Africa.

From giant squids to sharks with lasers, these underwater sea demons will make you spill your popcorn.

Marine park wants its orcas to remain in captivity for their own safety.

Ships create a racket that extends into frequencies used by the animals to communicate.

Their human caretakers will visit the 9,000-pound animals in the Sunshine State.

Activists want SeaWorld to end its orca breeding and retire those in captivity.

Critics say the company's decision doesn't address the fundamental problem: the welfare of killer whales.

The marine-life park has been under fire after the 2013 documentary "Blackfish."