When mature, cultures may form a deep red color due to the presence of pigments in the cells.

[3] Due to the scarcity of morphological characteristics visible under light microscopy, species of this genus have generally been overlooked.

[3] Coelastrella reproduces asexually by the formation of autospores, which are released by a tear in the mother cell wall.

Coelastrella has not been observed to undergo sexual reproduction, or exhibit life stages with flagella.

Examples of useful products of Coelastrella species include carotenoids suchas astaxanthin, or lipids such as linoleic acid.