Crocucurve

The crocucurve split from its ancestor the crocuflagella. It has spread across the surface of the Sagan 4's oceans and coastlines. Rather than a single cell it grows in half moon shaped clusters. The flagellum only grow on one side so they will go one direction (towards the sun). They grow in large numbers where nutrients are brought up from the deep oceans or near river deltas. During most in the autumn when conditions are right and create large "blooms" which tint the water a yellow hue. While they can move on their own they are mostly spread through the vast network of sea currents. They still reproduce via binary fission. They are extremely small and are only around 50 nanometers across.