Antarctic Krill (<i>Euphausia superba</i>) (IMAGE) Stony Brook University Caption Antarctic krill (Euphausia superba) can be up to 5 cm in length and are the primary food source for most of the marine mammals and seabirds in Antarctica. They are also commercially fished so it is important to ensure that human fishing activities do not negatively impact the native animals that rely on krill for energy for themselves and their offspring. Credit Joseph Warren, Stony Brook University Usage Restrictions With photo credit. 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.