Abyssal Ghark

The Abyssal Ghark migrated deeper and deeper until it reached the abyssal depths of Jujubee Ocean. Although food was less differentiated then in the North pole coast, there was as much, if not more food for the Gharks then at the coast. It has regained their use for their pressure resistance, and their caudal fin has enlarged yet again. Due to this, they waste less energy due to be able to go as fast as usually with less strokes, and because it is smaller. They became smaller due to the smaller individuals living longer then the larger ones and were able to mate more, eventually leading to this.

As for their dorsal fin, they have the same problem as their ancestors, it can easily rip. Now it is so thin, you can even slightly see through it.

Because they migrated, the Abyssal Gharks obviously split from their ancestors without replacing them.