User blog comment:Jamintheinfinite/Subnautica Creature Evolution/@comment-28450065-20181023165158

Oh also some extra groups.

Brinewing and Nootfish definitely go in a group together. Compare their general body shape and fins positions, very similar.

Squidshark and Brute Shark probably go together, their general body shapes are very similar, eye position is very similar, and though their jaws are very different, neither of them look ordinary. So may be two different evolutionary solutions from an ancestor that lacked a proper jaw.

Penguin and Pinnicarid go together. This is obvious when you turn the Pinnicarid sideways and see that it literally just looks like a skinny penguin.