90 Fun Facts About Orcas

Orcas are the largest members of which animal family?

Delphinidae, the oceanic dolphins, also takes in pilot whales and false killer whales, which are dolphins too despite the 'whale' in their common names.

What is the genus name for orcas?

Orcinus has a single living species, Orcinus orca, although a 2024 study argued that the North Pacific's fish-eating residents and mammal-hunting transients each deserve species rank.

What happens to an orca's heart rate when it dives?

It halves: one study measured roughly 60 beats a minute at the surface and 30 under water, a response that saves oxygen for the heart, lungs and brain.

What is the grey marking just behind an orca's dorsal fin called?

The saddle patch is the grey marking behind the dorsal fin; its shape, together with nicks in the fin, lets researchers identify individual orcas from photographs.

Which technique has Antarctic orcas swimming side by side at an ice floe to knock a seal into the sea?

Wave-hunting, also called wave-washing, is right: Antarctic pack-ice orcas swim abreast toward a floe to raise a wave that washes the seal into the water, where other orcas wait.

Biogeographers use which term for a species like the orca whose range covers most of the Earth?

Cosmopolitan: orcas live in every ocean from the Arctic to the Antarctic, though each population tends to specialise in local prey, from herring to seals.

Roughly how long is an orca pregnant before giving birth?

About 17 months: estimates run from 15 to 18 months, and because a mother usually bears a single calf only once every five years or so, each loss weighs heavily on a small group.

What IUCN Red List status has the orca, whose types may be separate species?

Data Deficient: the orca was rated 'conservation dependent' until 2008, when the IUCN dropped the rating because lumping every type together could hide one that is endangered.

An orca's black back and white belly are thought to serve mainly as what?

Camouflage: seen from above, the dark back blends into deep water, and from below the pale belly blends with the bright surface, so prey may not see the orca coming.

A tagged sub-Antarctic orca feeding on toothfish was recorded diving closest to which depth?

1,000 meters (3,300 feet) is closest: the whale reached 1,087 meters while raiding a fishing boat's toothfish catch, then made only shallow dives for about four hours after each such plunge.

Why did sailors give orcas the menacing common name 'killer whale'?

They saw them hunt larger whales: one theory holds that Basque whalers called them 'whale killers' and the words were swapped when the name passed into English.

Which naturalist gave the orca its first scientific name in 1758?

Carl Linnaeus named the orca in the 1758 edition of his Systema Naturae, the same edition in which he moved whales out of the fishes and into the mammals.

As of 2025, every confirmed fatal orca attack on a human has taken place where?

In captivity: wild orcas have bitten or bumped a handful of people without killing anyone, while captive orcas have killed four people since the 1990s.

How tall is the dorsal fin of an adult male orca?

About 1.8 metres, the height of a tall man: a bull's fin is more than twice a female's and stands straighter, so adult males can be told apart at a glance.

In the 1990s, some scientists blamed orcas for a population crash in which Aleutian Islands animal?

Sea otters: some researchers argued that orcas turned to otters after the seals they had been eating grew scarce, though the link was never directly proven.

Which salmon species dominates the diet of northeast Pacific resident orcas?

Chinook is right: it makes up roughly two-thirds of the salmon these orcas eat, and the southern residents follow its runs along the coast year-round, while sockeye and pink are barely taken.

What is it called when Norwegian orcas herd herring into a tight ball near the surface?

Carousel feeding: once the ball is packed tight, the orcas slap it with their tail flukes and pick off the stunned herring one at a time.

Orcas kill great white sharks by flipping them onto their backs, inducing what paralysed state?

Tonic immobility: some orcas first ram a shark side-on to stun it, then roll it belly-up and hold it there until the motionless shark suffocates.

Since 2019, orcas off Western Australia have been recorded killing which giant animal?

Blue whales: researchers logged the first three known kills, one of them an adult about 20 metres long, so the largest animal ever to live fell to hunters less than half its length.

Off Península Valdés in Argentina, orcas do what to snatch sea lions in the shallows?

Beach themselves temporarily, then wriggle back to sea; beaching is normally fatal to cetaceans and takes the young years of practice.

A captive orca at a marine park learned to catch what by regurgitating fish as bait?

Seagulls: the orca spat fish onto the surface to lure the birds within reach, then ate them, and others in the tank soon copied the trick.

In short bursts, roughly how fast can an orca swim?

About 50 km/h: estimates of an orca's top burst run from 45 to 56 km/h, among the fastest of any marine mammal, yet it usually cruises at under 13 km/h.

Which feature of resident orca society is rare among mammals?

Both sexes stay with their mothers for life among resident orcas: males leave only briefly to mate with females from other pods and then return to their mother's matriline.

Which young orca turned up alone in Nootka Sound in 2001 and became famous for befriending boaters?

Luna, a southern resident calf, spent years seeking out people and boats; plans to reunite him with his family stalled, and a tugboat propeller killed him in 2006.

Orcas are among the very few animals that go through what?

Menopause is right: female orcas stop breeding around age 40 yet can live decades longer, and these post-reproductive grandmothers lead their pods to salmon.

How old was the southern resident orca Granny (J2) estimated to be at her death?

105 is right: Granny (J2) was presumed dead in late 2016 with an estimated birth year of 1911, though a later biopsy-based study suggested she was only 65 to 80.

Which Roman writer described the orca as 'an enormous mass of flesh armed with teeth'?

Pliny the Elder also tells how an orca grounded itself in Ostia's harbour while gorging on spilled hides, and Emperor Claudius led soldiers out in boats to attack it.

A First Nation blocked the capture of a lone orca in Nootka Sound, believing it was whom reborn?

Their late chief: Ambrose Maquinna had told his people he would come back as a whale, the young orca appeared days after he died, and the band lured it away from the capture pen.

Since 2020, orcas off the Iberian coast have repeatedly damaged boats by targeting which part?

The rudder is right: since 2020 Iberian orcas have rammed and bitten the rudders of yachts, disabling their steering and sinking several boats off Spain and Portugal.

Which orca was harpooned in 1964 as a model for a Vancouver Aquarium sculpture, yet survived to go on display?

Moby Doll was taken for a female until the autopsy; he swam to Vancouver on the end of the harpoon line, lived about three months and never tried to attack his keepers.

In 1976, which US state closed its waters to orca captures after suing SeaWorld over a roundup?

Washington acted after a governor's aide, out sailing, saw collectors herding orcas with aircraft and explosives; the whales were freed, ending a trade that had taken about 50 since 1964.

Keiko, star of Free Willy, was released off which country's coast in 2002?

Iceland is right: Keiko was released from a sea pen in the Westman Islands in summer 2002, swam to Norway, and died of pneumonia in a Norwegian bay in December 2003.

Before Free Willy made him famous, Keiko was the star attraction of an amusement park where?

Mexico City: Keiko's warm, chlorinated tank at Reino Aventura was better suited to dolphins, and his poor health there fuelled the campaign that later moved him north.

Which pop star's ballad 'Will You Be There' became the theme song of Free Willy in 1993?

Michael Jackson had released the song two years earlier on his Dangerous album; reissued as the film's theme in 1993, it won the MTV Movie Award for best song from a movie.

The original Shamu was flown in 1965 to the very first SeaWorld park, in which city?

San Diego's park had opened only the year before; Shamu had been netted in Puget Sound by a Seattle aquarium owner, who sold her on within about two months.

Old Tom, an orca who died in 1930, was famous for helping whalers at which Australian port?

Eden is right: Old Tom's pod herded baleen whales into Twofold Bay for the Davidson family's whalers, and his skeleton is displayed in the Eden Killer Whale Museum.

Which prey do the large, open-water Antarctic Type A orcas mainly hunt?

Antarctic minke whales: Type A orcas chase them in open water, while their Type B neighbours work the pack ice for seals and Type C orcas live on fish.

In late 2005 the southern resident orcas received what official designation?

US Endangered Species Act protection is right: NOAA listed the southern resident orcas as endangered under the Act in November 2005, citing prey depletion, PCB pollution and past captures.

Orcas pick up the returning echoes of their own clicks mainly through which body part?

The lower jaw: soft tissue there carries returning sound to the ears, while the clicks themselves are beamed out through the forehead.

Some Antarctic orcas look brown and yellow because of what in the water?

The microscopic algae coat their skin; the same diatom film gives Antarctic types B and C their yellowish tinge.

What colour are the 'white' patches on a newborn orca?

Yellow or orange is right: a newborn's eye and belly patches carry a yellow to orange tint that fades to white over the calf's first year.

Toxic chemicals such as PCBs build up over the years in which tissue of an orca?

Fat: the chemicals lodge in an orca's blubber, and when food runs short and the whale burns those reserves, the poisons are released into its body.

What do humpback whales sometimes do when orcas go after calves, even of other species?

Mob the attackers: humpbacks thrash their barnacle-studded flippers and tails at hunting orcas, and the habit may simply spill over when the victim is a seal or another whale's calf.

Because they hunt in coordinated groups, orcas are nicknamed which animals 'of the sea'?

Wolves: like a wolf pack, a group of orcas chasing a large whale will run it to exhaustion before attacking, and often singles out a calf.

In 2025, Salish Sea orcas were reported grooming each other with lengths of what?

Bull kelp is right: a 2025 study found southern resident orcas biting off bull kelp stalks and rolling them between their bodies, a grooming behaviour the authors named 'allokelping'.

Which marine mammal, sometimes hunted by orcas, has the heaviest brain of any animal?

Sperm whale: its brain is more than five times the weight of a human's; when orcas attack, the females may ring their calves with tails outward to beat the hunters off.

Newborn orcas and their mothers go about a month almost entirely without what?

Sleep: a 2005 study in Nature found newborn orcas and their mothers stay on the move around the clock for the first month, then slowly build up to normal rest.

What are the three categories of sound that orcas produce?

Clicks, whistles and pulsed calls is right: each resident family shares a dialect of repeated pulsed calls, and a calf learns its repertoire from its mother even with other orcas calling nearby.

Why are mammal-hunting transient orcas usually silent while hunting?

Their prey hear calls well is right: seals and porpoises hear orca calls and would flee, so transients hunt in near silence, while fish-eating residents chatter because salmon hear poorly.

In the first recorded wild orca infanticide (2016), a male was helped by which relative?

His mother is right: in December 2016 off British Columbia an adult male and his elderly mother together killed a newborn calf, probably so that the male could later mate with the calf's mother.

One orca pod lost over a third of its members within two years of which oil spill?

Exxon Valdez: the AB pod numbered 36 when the tanker ran aground in 1989, and 14 of them vanished over the next two years after whales were seen surfacing in the slicks.

Along with dolphins and porpoises, orcas belong to which group of whales?

Toothed whales: for all their teeth, orcas do not chew, swallowing small prey whole and tearing larger prey into chunks first.

Lime Kiln Point, one of the world's best spots to watch wild orcas from shore, is on which Salish Sea island?

San Juan Island: the park sits on a rocky cliff on the island's west side, where orcas pass close enough inshore to be watched from the lighthouse.

Which of these senses do orcas appear to lack altogether?

Smell: the brain regions and nerves that handle it are missing, which makes sense for an air-breather that spends most of its life holding its breath under water.

Which term describes an orca holding its head vertically above the surface to look around?

Spyhopping lets an orca look around above the surface, and Antarctic orcas use it to pick out seals resting on ice floes before the group moves in.

What is an orca doing when it 'breaches'?

Leaping fully out of the water is right: a breach lifts most or all of the body clear of the surface, and may serve courtship, communication, parasite removal or play.

A typical adult male orca weighs roughly as much as which land animal?

An African elephant bull averages about six tonnes, so an ordinary male orca matches the largest animal on land, and the biggest, at over ten tonnes, outweigh it.

Some orcas have been seen swimming around with what on their heads, like hats?

Dead salmon is right: the fad was first seen among the southern residents in 1987, spread to several family groups, soon died out, and was spotted again in Puget Sound in 2024.

Alaskan orcas have learned to steal fish from which kind of fishing gear?

Longlines: orcas gather where boats are hauling and strip the hooked fish from the lines, a habit now widespread enough to hurt fisheries.

The 1977 thriller Orca, about a killer whale bent on revenge, was made to cash in on which blockbuster?

Jaws had come out two years earlier, and producer Dino De Laurentiis ordered up a sea monster of his own: an orca that hunts down the fisherman who killed its pregnant mate.

About a quarter of orcas captured in Puget Sound through 1970 carried scars from what?

Bullets: orcas were then feared and treated as pests that competed for fish, and shooting at them was accepted and even encouraged by governments.

Which people of Hokkaido called the orca Repun Kamuy, a god of the offshore sea?

Ainu is right: the Ainu of Hokkaido revered the orca as Repun Kamuy, god of the offshore sea, and gave stranded orcas funerals as they did for brown bears.

The Lummi people's word for orcas, qwe'lhol'mechen, translates roughly as what?

Our relations under the waves, also rendered 'people beneath the waves': the Lummi Nation regards the southern residents as kin and has held ceremonies to feed live salmon to an ailing whale.

Orcas have been known to prey on which large land mammal as it swims between islands off North America's northwest coast?

Moose: orcas are the only confirmed marine predator of the largest deer on Earth, though such kills are rare, and smaller deer crossing the same channels are taken too.

On Scott's Terra Nova Expedition, orcas tried to tip a floe under a photographer and what?

Sled dogs: two were tethered at the floe edge beside photographer Herbert Ponting when orcas rose under the ice and split it, then reared their heads through the cracks to look for them.

Sailors harassed by orcas off Iberia are told to drop bags of what overboard?

Sand clouds the water and is thought to confuse the orcas' sonar.

What is the main food of the Iberian orcas that gather in the Strait of Gibraltar?

Atlantic bluefin tuna is right: the Strait of Gibraltar orcas feed on bluefin, following the tuna's migration along Portugal and Galicia through summer before heading offshore in autumn.

Northern resident orcas swim into the shallows of Johnstone Strait to rub their bodies on what?

Pebbles: the whales return to a few favoured rubbing spots, and the best known, Robson Bight, is a reserve that boats are asked to stay out of so they are left in peace.

In March 2016, SeaWorld announced it would end what?

Its orca breeding programme is right: on 17 March 2016 SeaWorld announced an immediate end to orca breeding, making the whales then in its parks its last generation.

Wanda, the first orca taken for display (California, 1961), survived in her tank how long?

Two days is right: Wanda, netted in Newport Harbor in November 1961 for Marineland of the Pacific, died within two days after racing around her tank and ramming its walls.

What is the name of the original Shamu usually said to mean?

Friend of Namu is the usual gloss, though some read it simply as 'She-Namu': she was caught in 1965 to share a Seattle pen with the bull Namu, then sold to SeaWorld within months.

Shamu was retired in 1971 after biting an employee who had been told to do what?

Ride her in a bikini is right: SeaWorld employee Annette Eckis was put on Shamu for a publicity film in April 1971, but the orca had been trained to work only with wetsuited trainers and seized her legs.

Tokitae, or Lolita, spent over 50 years at which Florida marine park?

Miami Seaquarium held her from 1970 until she died in August 2023, five months after it announced plans to move her to a sea pen in her home waters.

The captive orca Tokitae was renamed Lolita after the heroine of whose novel?

Vladimir Nabokov is right: the park took the name from the title character of his 1955 novel when it put her in a tank with Hugo, a male caught in the same waters two years earlier.

Which delivery company donated the Hercules cargo plane that flew Keiko, the Free Willy orca, to Oregon in 1996?

UPS lent the Hercules for the flight; gifts from a foundation and from schoolchildren had given the Oregon Coast Aquarium over $7 million to build him a seawater pool and nurse him back to health.

How does Willy finally reach the sea in Free Willy?

Jumping a breakwater: with boats sealing off the marina, the boy Jesse runs out onto the wall and gives the signal, and the orca sails over his head.

Who directed the 2013 documentary Blackfish?

Gabriela Cowperthwaite's film cost SeaWorld dearly: attendance fell after its release, a slide the company partly blamed on the documentary, and its share price more than halved within three years.

Tilikum's 2001 calf Nakai was the first orca conceived by which method?

Artificial insemination let SeaWorld breed from Tilikum without moving him between parks, and he went on to father 21 calves in all.

Tilikum's first fatal incident, in 1991, happened at which park near Victoria, BC?

Sealand of the Pacific is right: trainer Keltie Byrne drowned there in February 1991 after slipping into the pool with Tilikum and two females; the park sold its orcas to SeaWorld and closed in 1992.

Which SeaWorld Orlando trainer's 2010 death prompted the making of Blackfish?

Dawn Brancheau is right: she was killed by Tilikum on 24 February 2010, and the director began Blackfish partly in response to claims the orca had grabbed her by her ponytail.

Trainer Alexis Martínez was killed by the orca Keto on Christmas Eve 2009 at which park?

Loro Parque is right: Martínez, 29, was rammed by Keto while rehearsing a Christmas show at the Tenerife park, which called it an accident, though the autopsy found crush injuries and bite marks.

In 2018, Wikie of Marineland of Antibes was reported as the first orca to do what?

Mimic human words: she copied 'hello', 'bye bye', her trainer's name Amy and a count of three through her blowhole, in a study of how orcas learn sounds by imitation.

Kiska, dubbed 'the world's loneliest orca', spent her last 12 years alone at a park beside Niagara Falls in which country?

Canada banned keeping whales and dolphins captive in 2019, yet Kiska stayed on alone at Marineland under a grandfather clause until she died in 2023.

In 2018, southern resident Tahlequah (J35) carried her dead calf for how many days?

17 is right: Tahlequah carried her dead newborn for 17 days, and two years later she gave birth again, to a son named Phoenix.

Why was Granny (J2) released after being netted with her pod in 1967?

Too old for a marine park is right: Granny was judged too old to sell when her pod was netted in Puget Sound in 1967, and her age was later estimated from her presumed descendants.

Port and Starboard, two males famous for killing great whites, hunt off which country?

South Africa is right: Port and Starboard, named for dorsal fins collapsed to the left and right, have hunted great whites off Gansbaai and False Bay since at least 2017.

Great whites killed by Port and Starboard wash ashore with which organ torn out?

The liver: the orcas open a shark between its pectoral fins to pull out the fatty organ, and great white sightings nearby later fell to almost nothing.

For herding whales toward Australian whalers' boats, Old Tom's orca pod was rewarded with which parts of each carcass?

The tongue and lips went to the orcas under an unwritten bargain the whalers called the Law of the Tongue; the men kept the rest of the whale for its oil.

The southern resident orcas form a single clan made up of which three pods?

J, K and L is right: the three pods' call dialects are related, and each whale is known by its pod letter and a number, which is how Granny became J2.

Four dams on which river are blamed for starving southern resident orcas of salmon?

The Snake is right: its four lower dams restrict the salmon runs these orcas depend on, and Tahlequah's 2018 vigil with her dead calf brought fresh calls to remove them.