Northern Snakehead (IMAGE) UK Centre for Ecology & Hydrology Caption Northern Snakehead (Channa argus) tops the list of alien species, not yet established in the European Union, that pose the greatest potential threat to biodiversity in the region Credit Picture: George Berninger Jr., CC BY-SA 4.0, Wikimedia Commons Usage Restrictions Picture: George Berninger Jr., CC BY-SA 4.0, Wikimedia Commons Ideally hyperlink: https://commons.wikimedia.org/wiki/File:Northern_Snakehead_(Channa_argus)_-_GRB.JPG 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.