Microbial community on the surface of kelp (image) Frontiers in Ecology and Evolution Share Print E-Mail Caption Each dot or filament is a bacterial cell and the different colors indicate different kinds of bacteria. The larger, ridged ovals are single-celled algae called diatoms. Download in high-res: 1) http://bit.ly/2PeDFCg Credit Tabita Ramirez-Puebla and Jessica Mark Welch, Marine Biological Laboratory. Usage Restrictions None Share Print E-Mail 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.