African River Prawns (image) Stanford University Caption Workers are shown preparing African river prawns to consume parasite-carrying aquatic snails in Senegal. The effort, led by Stanford researchers, is one of the projects funded by the Stanford Woods Institute for the Environment. Credit Photo: Susanne Sokolow Usage Restrictions non-profit use only. 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.