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Is an Orca a Whale or a Dolphin? (Explained) - Wildlife Informer
Orca - Wikipedia
Orcas (Killer whales) - National Geographic
Why is an Orca Not a Whale? - Ocean Conservancy
Facts about orcas (killer whales) - Whale & Dolphin Conservation …
Killer whale | Definition & Facts | Britannica
Orcas - National Geographic Society
Are Orcas Not Whales But Dolphins? | Snopes.com
Are Orcas Dolphins - American Oceans
Killer Whale | NOAA Fisheries