Microbrachios triflagella
Microbrachios triflagella is a microscopic organism that feeds on scraps of Primophytorus ovalus and Stratunato virenoarvus that drift down to the river floor of Zone 31. It can travel by contracting its elongated body side-to-side to propel when searching for food and by using its limblike flagella as small boosts when it chooses not to spend as much energy swimming and doesn't swim with its body.
Microbrachios triflagella grows to three hundred micrometers (300μm) in length and propells its skinny body with four sets of three flagella and another set at the front that consists of four flagella on each side. A set of two mandible-like structures that are highly modified flagella help to bring in food into the mouth to be digested. The cell has a cell membrane for support but has no cell wall or cell capsule.
Microbrachios triflagella has a set of basic organelles. These include a nucleus, food vacuoles where food is digested, mitchondria, and an endoplasmic reticulum, along with a vacuole where undeveloped clones are held in the same manner as in the palean Linialacina byssumcoda. One pair of eyespots is at the front of the cell that allow for a weak sense of light detection. These unicellular organisms prefer to be at the bottom to avoid being drifted away from the currents of the river.
Microbrachios triflagella takes four days to fully develop. When mature, individuals produce and release a clone of themselves once every two days out of a hole underneath their abdomen, with the necessary organelles to survive and function. Newborn clones are a scaled-down copy of the adult at fifty micrometers (50μm) in length.