How Rorqual Whales Feed (image) Cell Press Share Print E-Mail Caption To eat, rorqual whales open their mouths and lunge while their tongues invert and their mouths fill like giant water balloons full of floating prey. The whales' nerves are stretchy so they can withstand the tissue deformation. Credit Vogl et al./Current Biology 2015 Usage Restrictions Credit Required. Share Print E-Mail 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.