Bacteroidetes
Bacteroidetes can also be found in marine environments such as seas , oceans and lakes. They are the third most common bacteria found in the ocean. They are found on surfaces (living and non-living), rocks and minerals, corals and algae. They are an important part of floating bacterial life (bacterioplankton) in marine environments. Bacterioplankton are involved in the recycling of essential elements in marine ecosystems. Bacteroidetes breakdown large organic matter in marine environments.