Coleochaete
There are about 15 species of Coleochaete. The genus is periphytic and often found attached to submerged portions of aquatic plants, or on the underside of water lilies. They are able to survive periodic dry spells while living on rocks along the edge of oligotrophic freshwater lakes and ponds.
 
Some species grow in moist air environments, which suggests an ability to survive in terrestrial environments and reinforces the evolutionary link with land plants. Coleochaete can also grow as disk-like colonies on the sides of glass aquaria and is sometimes found in low pH Sphagnum bogs.
The genus has not been found in brackish or more extreme habitats.