Okay, I've only played a few minutes now, but here's my first impressions:
-Great work on limiting the motion effects. The world feels alive without my stomach doing any flips!
-The camera can get stuck "inside" a rock when following a fish. Maybe there's a way to make rocks within a certain distance of the camera phase out? The plants are not an issue.
-I have a fish at over 100% evolution, but it's still a Silvery Tetra. Does that number reset to zero and build back up to 100% (and thus this is a bug) or should it stay at 100% and evolve each 100%?
Oh, and it would be nice if right-click deselected whatever you had selected at the top (plant/meat/minnow) and then deselected a fish you were following.
Also, some story reason for why the fish aren't just eating the plants around them but need us to feed them.