Dartmouth Rock Snot Study (1 of 2) (IMAGE) Dartmouth College Caption The native freshwater algae known as "rock snot" grows on river bottoms worldwide. Credit Credit Brad Taylor Usage Restrictions Credit Brad Taylor 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.