the water refraction/ripple/reflection should be following the horizon line.. (when you distorted the water you should have followed the top line of the pool, not the line closes to you) if that was your goal (and water reflections for the dolphins would be in order (flip and blur/opacity etc..) this is a very fun and great idea.. (you can also add a slight ripple,burn to where the dolphins meet the water to help in the realism... good luck on this.. sweet idea

the dolphin with the ball shouldn't be transparent or glowing

good idea. The dark line(near the bench) between grass and water looks odd. remove it and add a concrete edge.

Very nice concept. Why is the dolphoin with the ball opaque? it should not be lol.

cool