Oooh I like the trumpets and the water effects :D I think you may have gone a little too far with the low pass filters, the bass is really present in the mix and can be a bit overpowering (I had to lower the volume when I pressed play). As some other folks mentioned I think I'd prefer a stronger rhythmic emphasis as well to keep driving the tension. Overall great job though, definitely a worthwhile experiment - I think this had really convincing underwater vibes! I like the riff at 1:53 as well, very funky.