Crarus

The Crarus replaced it's ancestor due to it's already dwindling population after the evolution of the Cruxir. Due to a genetic abnormality in a some cruris that caused deformity during growth, causing asymmetry and a thicker cell wall to form. Other than that, the population was healthy and thrived, their odd shape actually confused some predators for a time. Crarus are what eventually evolved from this odd mutation. They are nocturnal feeders, meaning they descend to feed on waste and dead matter at night, while during the day they ride the waves near the surface taking in sunlight for energy. Since predators had gotten used to the odd shape of the deformed cruris, the crarus formed a 'fake' defense in it's tooth-looking protrusions. Two of the cruris's flagellum became the tooth like protrusions, which are mostly for show. These "fake-tusks" attempt to scare small predators away while it rests vulnerably at the surface. Another advantageous trait is the development of a pseudo-mouth, which is really just a thinning of the cell wall in order to absorb food easily. The red organelle next to the nucleus serves as a toxin purifier, making sure that it gets the most out of it's food.