Anabaena (IMAGE) University of Alberta Caption This is Dolichospermum crissum, one of the most problematic cyanobacteria in Alberta lakes. Credit FlowCAM photo, courtesy Mark Graham Usage Restrictions None 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.