👉 Picomonadida are unicellular, single-celled organisms that have a central cell nucleus surrounded by other cells forming a multicell structure. They primarily live in freshwater environments and can be found in various aquatic ecosystems, such as rivers, lakes, and oceans. These organisms are known for their unique characteristics, including the ability to form colonies with other picomonadids, which can be more numerous than individual picomonadids due to their large cell size and complex structure.