You have some stunning visuals in there, everything's looking super beautiful and I love how you really succeeded in making the water/ocean feel extremely "water-ish", which probably is one of the hardest things in animation.
Only thing that bothered me is, that in the end it turns out to be a looping film. For me personally, loops always take a way alot from the film illustrating a "special event/adventure" that should only happen once to stay unique.