like the rhythm

i dont know how does one make such a fantastic atmosphere

* This is an official 2017 NGUAC review *

Good thing my dolphins and I were able to defeat the alien menace, or this world would have been doomed! On to specifics...

Mixing, mastering and production: Really, really fantastic creative work on the mix. The effects, their implementation, the panning and reverb, all of it stellar. The basic mix was solid too - everything was fairly clear and effective. The only real area where I docked points was in the mastering. This was just for some little balancing things:
Dynamic variety is a great thing to have, especially in a longer piece like this. The problem in this case was that it was difficult for me to set a comfortable listening volume. If I wanted to get the highs and melodies clearly, I'd need to turn up to the point where the droning bass was fairly overpowering. And then when things built up at 3:50 I had to turn down a bit again. Individually, all of these sections sound great. And dynamically, it's a great journey. But it was a little difficult from a volume perspective.
The droning bass could have been a little quieter if you're going to use it throughout most of the track in the way you did. It starts to wear on the ears a bit. Or, if you want to keep it at that volume and intensity, then an option is to not have it run through 75% of the track.

Besides those things, there's not too much else I can pick out here. The end mix is never dramatic and in your face, but it's not supposed to be - it's a subtle journey done well.

Composition: Very original, great atmosphere, very cool textures you've built. Solid journey structure as well. My only real points off were for melody. This track is super for a number of reasons, but melody is not one of them. Naturally, with a piece like this, having catchy melodies is not really at the forefront of your goals, nor should it be. But you can't ignore melody entirely and expect a perfect score, either.
You don't need to have melodies throughout, but I think a good, clearly defined melody at a couple points here and there would really have made Sea Quest pop and excel. A good example I can think of is 1f1n1ty's track 'Peaks' (also in the NGUAC audition phase) - it's a similar journey piece, but there are a couple moments with some fantastic melodies.

Ultimately, good stuff though! A very mature kind of track. I'm looking forward to see what you come up with for next round.

this would be very good for an underwater game

Very nice and good sound effects!