>>5026434 (OP)https://www.smithsonianmag.com/science-nature/why-do-pilot-whales-chase-killer-whales-near-iceland-180978758/
“Then the killer whales just went silent,” says Samarra, a biologist and lead investigator of the Icelandic Orca Project. As the whistling grew stronger a group of pilot whales came into view, and the killer whales seemed to turn and swim away.
“It’s quite unusual because the killer whale is this top predator,” says Anna Selbmann, a doctoral candidate at the University of Iceland who is supervised by Samarra. “It’s very unusual that they’re afraid of anything—or seemingly afraid.”
Interactions between killer and pilot whales have only been scientifically documented a few times, and Samarra is among the first scientists to have observed this behavior in Iceland. Since the 2015 encounter, she’s seen similar interactions around 20 times.