Really cool ideas here! Contrasting Dorian to Phrygian is a very unique compositional idea, that makes as lot of sense! Same with using 5/4 to "depict" swimming (which I especially enjoyed 'cause I love 5/4). I like the use of leitmotifs, they make the ost sound more connected, which is great!
The production here is pretty solid, and everything sounds good.
This is a pretty good submission! Nice job!