Orca
Orcinus orca
Quick answer
The orca, or killer whale, is the largest member of the dolphin family and an apex predator found in every ocean on Earth. Highly intelligent and social, orcas hunt in coordinated family groups called pods and can weigh up to 6,000 kg (13,000 lb). Wild orcas can live 50 to 80 years or more.
Orca facts at a glance
| Scientific name | Orcinus orca |
|---|---|
| Diet | Carnivore |
| Habitat | All oceans, from polar to tropical |
| Lifespan | 50–80+ years in the wild |
| Weight | Up to 6,000 kg (13,000 lb) |
| Top speed | Up to 56 km/h (35 mph) |
| Conservation status | Data Deficient (IUCN) |
| Kingdom | Animalia |
|---|---|
| Phylum | Chordata |
| Class | Mammalia |
| Order | Artiodactyla |
| Family | Delphinidae |
| Genus | Orcinus |
Intelligence and family pods
Orcas are among the most intelligent animals in the ocean. They live in tight family groups called pods, led by the oldest females, and stay with their mothers for life. Different pods have their own dialects of calls, distinct hunting techniques, and even food preferences, a form of culture passed down through generations.
Apex hunters
As apex predators, orcas have no natural enemies. Depending on the population, they hunt fish, seals, sea lions, penguins, sharks, and even other whales. They use remarkable cooperative strategies, such as creating waves to wash seals off ice floes and beaching themselves briefly to grab prey at the shoreline.
Built for the open ocean
The orca's powerful tail can drive it through the water at up to 56 km/h, making it one of the fastest marine mammals. Its distinctive black-and-white coloring helps break up its outline while hunting, and its tall dorsal fin, reaching up to 1.8 m in males, makes it instantly recognizable.
Conservation
The IUCN currently lists the orca as Data Deficient because the species spans many distinct populations with very different levels of risk. Some local populations are healthy while others are threatened by pollution, declining prey, noise, and disturbance, so conservation is managed population by population.
Frequently asked questions about the Orca
Is an orca a whale or a dolphin?
The orca is actually the largest member of the dolphin family, even though it is commonly called the killer whale. Like other dolphins, it is a highly social, intelligent marine mammal.
What do orcas eat?
Orcas are carnivores with diets that vary by population. Different groups specialize in fish, seals, sea lions, penguins, sharks, or even other whales, using coordinated group hunting techniques.
Are orcas dangerous to humans?
Despite the name killer whale, there are no confirmed records of wild orcas killing humans. Serious incidents have involved captive orcas, while wild orcas generally show little aggression toward people.
How long do orcas live?
Wild orcas can live 50 to 80 years or more. Females tend to live much longer than males, and some have been documented living well past 80.
How fast can an orca swim?
Orcas can reach speeds of up to about 56 km/h (35 mph) in short bursts, making them one of the fastest marine mammals and formidable pursuit hunters.
