Killer Whaleシャチ

Species Data

Classification

Artiodactyla / Delphinidae Source

Distribution

Found in all oceans and most seas worldwide, with a preference for higher latitudes and coastal waters; densities are highest off Norway, the Aleutian Islands, the Gulf of Alaska, and in Antarctic waters. Around Japan it is most often sighted from the Kuril Islands to Hokkaido, though past hunting has limited current numbers. Source

Did You Know?

• It forms complex matrilineal societies and exhibits distinct pod 'dialects,' with hunting techniques and vocalizations passed down across generations—evidence of animal culture. Source
• It is the largest member of the dolphin family and one of the few animals known to undergo menopause, living decades beyond reproductive age. Source
• In 2025, researchers documented the first known tool use in orcas, a behavior called 'allokelping' involving the manipulation of kelp. Source

FAQ

Is the killer whale actually a whale?

No, biologically it is the largest species of oceanic dolphin (family Delphinidae), not a true whale, despite its common name. Source

What threats do killer whales face?

Major threats include depletion of prey species like salmon, pollution from toxins such as PCBs, vessel noise and collisions, and historical capture for marine parks. Source

Why is the IUCN status listed as Data Deficient?

Because killer whale populations vary enormously in diet, behavior, and genetics across regions, the IUCN has not yet been able to assess the species as a single global population. Source