Hi chanfy, sorry to tell you your map has been rejected.
The theme is not very original, since there are already a lot of "fish" or "aquarium" maps. The build is not great, it's not very attractive and it's mostly floating, try to have the map as one main build next time. The parkour isn't great either, it's kind of repetitive (try to use different kinds of blocks like vines, panes, ice, etc.) and there are a lot of barriers which takes away from the map.
Thanks for submitting, I'd love to see more maps from you!