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  1. Orca - Wikipedia

    The orca (Orcinus orca), or killer whale, is a toothed whale and the largest member of the oceanic dolphin family. The only extant species in the genus Orcinus, it is recognizable by its distinct …

  2. Orcas (Killer whales) | National Geographic

    What are orcas? Orcas, or killer whales, are the largest of the dolphins and one of the world's most powerful predators. They're immediately recognizable by their distinctive black-and-white...

  3. Facts about orcas (killer whales) - Whale & Dolphin Conservation USA

    Orcas (also known as killer whales) are marine mammals. They belong to the sub-order of toothed whales (known as odontocetes) but are also the largest member of the dolphin family.

  4. Orca - National Wildlife Federation

    Even though orcas can see above and below water, it is their hearing and echolocation abilities that help them locate objects in the water. By emitting clicks and listening for echoes, orcas are able to …

  5. Killer Whale - NOAA Fisheries

    Aug 18, 2025 · Scientific studies have revealed many different populations with several distinct ecotypes (or forms) of killer whales worldwide—some of which may be different species or subspecies. They …

  6. Orcas: Facts about killer whales - Live Science

    Jan 28, 2025 · Orcas are often called killer whales, even though they almost never attack humans. They live in every ocean around the world, from the warm waters near the equator to the icy depths …

  7. Killer whale | Definition & Facts | Britannica

    Jan 19, 2026 · Orcas are called killer whales because of their reputation as powerful predators in the marine world. The name comes from ancient sailors who watched orcas hunting large marine animals.

  8. Orcas // Killer Whales | United States | Center For Whale Research

    The salmon abundance from the Elwha River ecosystem, flowing into the Strait of Juan de Fuca, can provide a healthy food source for the Southern Resident orcas and a sustainable, nearshore …

  9. About Orcas - Dolphin Project

    Jan 12, 2026 · Orcas (Orcinus orca) or killer whales are the world’s biggest dolphins, possessing the second-largest brain of all marine mammals. They belong to the order Cetacea (from the Greek …

  10. Learn About Orcas – OrcaLab

    They are known as Orcas, Killer Whales or – off the west coast of North America – Blackfish. They are found in all of the world’s major oceans, covering all latitudes, and inhabit both coastal waters and …