Here's a breakdown:
* Oceanic: These are the most widely distributed, found in all oceans, but they tend to prefer colder waters.
* Coastal: These populations are more localized and can be found in coastal areas, bays, and estuaries.
Some specific regions with notable killer whale populations include:
* North America: Alaska, British Columbia, Washington, Oregon, California
* South America: Chile, Argentina
* Europe: Norway, Iceland, Scotland, Ireland
* Africa: South Africa
* Asia: Japan, Russia
* Antarctica: The Southern Ocean
Keep in mind that killer whales have distinct populations with unique characteristics, behaviors, and diets.