Rojerius

Splitting from its ancestor, the rojerius have spread along the coastlines of the Dixon-Darwin supercontinent. Larger and more robust in terms of form, their shells have become segmented and now bear a large spine for defense. Larger fins allow them to paddle through the water faster, and their extended mouth is better suited for reaching into tighter spots in search of pockets of food that might be hidden within, though for the most part they stick to open water.

The hierarchal swarms tend to be tightly packed together for protection from predators. They are kept in formation by sensing the bioelectrical pulses they natural produce, which serves as a form of communication between individuals. Swarms will also use this to communicate with other swarms by "talking" all at once. Larger swarms can overwhelm the senses of smaller ones through this, and through doing so drive them out of their feeding grounds and thus allow their own to take them over.

Other than this, the species has not changed much from its ancestors.