Yellow Whales (IMAGE) NOAA Fisheries West Coast Region Caption Killer whales in Antarctica, as shown here, often display a yellow coloration due to diatom accumulation on their skin, evidence that they are not sloughing skin in frigid waters. Image collected by John Durban (NOAA Fisheries) and Holly Fearnbach (SR3) using a remotely controlled hexacopter drone at 100-foot altitude, authorized by NMFS research permit 19091 and Antarctic Conservation Act Permit 2017-029. Credit John Durban/NOAA Fisheries and Holly Fearnbach/SR3 Usage Restrictions Image collected by John Durban (NOAA Fisheries) and Holly Fearnbach (SR3) using a remotely controlled hexacopter drone at 100-foot altitude, authorized by NMFS research permit 19091 and Antarctic Conservation Act Permit 2017-029. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.