They’ll kill you with their icy glare.
New footage reveals that penguins are calculating mass killers.
Researchers strapped one-ounce cameras to the backs of 11 Adélie penguins off the coast of Antarctica and over the course of 88 minutes the birds devoured 244 krill and 33 fish without missing a single target.
“Our movies showed that the foraging behavior of Adélie penguins is remarkably fast and efficient,” researchers wrote in Proceeding of the National Academy of Sciences.
Before conducting their research, scientists Yuuki Watanabe and Akinori Takahashi of the National Institute of Polar Research in Tokyo examined the stomach contents of penguins to figure out what the birds ate.
But the scientists had no idea how ruthless the penguins would be as they snapped up tiny fish and darted through schools of krill.
One penguin in particular shocked the researchers when it swam through a group of krill and snatched up two of the tiny shrimp in under a second.
In another astonishing scene, one of the penguins swam up behind an unsuspecting fish as it swam near the ice and gobbled it down before the prey could even react.