Marine oil snow (IMAGE) Universitaet Stuttgart Caption Microbial oil snow, see brown flake-like small structures, in microcosms with North Sea water. Microbial oil snow is a phenomenon in which microbial oil-degrading bacteria form solid aggregates in water. These aggregates look like snowflakes or snowballs, hence the name oil snow. Credit Lu Lu Usage Restrictions no restriction 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.