Really enjoyed the feel of the animation transitions! The educational focus is a nice touch; being able to see a 'stat sheet' description of the fish gives me more encouragement to read the content.
I think it would be beneficial to gameplay flow for the air pockets to be more easily identified. Currently, It's leaning towards a memory challenge where the player needs to know where to go beforehand, rather than facilitating players reacting to their environment by moving to air pockets they discover.
As a minor note, music in my session did not loop. The track is long enough if you succeed in a few tries, but not otherwise.
Great job!