A video showing an orca mimicking human speech has both fascinated and unsettled viewers online. Killer whales, or orcas, are already known for their high intelligence as the largest members of the dolphin family and apex predators of the ocean. Scientists have long studied their cognitive abilities, but their potential to imitate human-like sounds has brought new attention to just how advanced they may be.

This discovery comes from a 2018 study published in Proceedings of the Royal Society B: Biological Sciences, conducted by an international team of researchers. The study, involving scientist Josep Call, aimed to test how flexible orcas are in copying unfamiliar sounds. To do this, they worked with a 14-year-old orca named Wikie in a French aquarium, first training her to mimic her calf’s sounds before introducing human words like “hello,” “Amy,” and “bye-bye.”

The results were surprising. Wikie managed to imitate several sounds quickly, even getting some right on her first try. Recordings of her attempts later spread across social media, where reactions ranged from amazement to discomfort. Many viewers described the sounds as both funny and eerie, with some calling them “creepy” or even “demonic,” highlighting how unusual it is to hear an animal produce human-like speech.

According to Call, this experiment provides the first clear evidence that orcas may be capable of vocal imitation. This ability could help explain how different groups of orcas develop unique communication styles, or “dialects,” in the wild. Despite having very different vocal anatomy from humans, the fact that orcas can still produce similar sounds suggests a remarkable level of adaptability and intelligence.