User blog comment:Jamintheinfinite/Subnautica Creature Evolution/@comment-28450065-20181006163448

I think the Peeper grouping should be changed.

The Peeper and Oculus have more in common with each other than the Peeper and Ice Peeper.

Despite appearances, the Oculus is actually much closer to the Peeper than the Ice Peeper is, as shown by the fin shape. The Oculus and Peeper have the same fin design whilst the Ice Peeper's fins are long tendrils that don't resemble its relatives at all.

I believe that instead of the current arrangement, you should have a common ancestor from which the Peeper and Ice Peeper both split, rather than the Ice Peeper splitting off from the Peeper.