Cube Mosshroom
The Cube Mosshroom split from its ancestor and moved into freshwater habitats, becoming roughly cube-shaped in the process. This is an adaptation for the lower amounts of large dead organisms to feed on; it instead has to mainly feed on detritus from much smaller organisms, and the cube shape allows it to tessellate with neighboring mosshrooms on the comparatively flatter surfaces it has to work with. Like other mosshrooms found in rivers, its crystal nature protects it from desiccation and it can survive in the floodplain as long as a flood comes to wash its spores away. Similar to oceanic species, it can be seen covering the ground even long after the detritus has vanished from the naked eye, and it appears to have a reddish “fiery” core when held to light.