♫Darling it's better
Down where it's wetter
Take it from me
Up on the shore they work all day
Out in the sun they slave away
While we devotin'
Full time to floatin'
Under the sea!♪
Oh, wait — wrong song.
Anyway, I think it sounds good but I would say that some of the mallet and wind instruments, and definitely the arpeggios around 3 minutes feel too loud. I'd also say that a lot your harmony is a tad too "dark" to me. At least, when I think of the sea and the picture you've chosen, I think happy and floaty and not like Jaws. But around 2:10 or so, the chords and everything there feels more like 1930s murder mystery.
Also, those brass samples
Overall though, I enjoyed the piece! I'd just look at fixing up the dynamics a bit.