Hey, 'Phoamz! This...is astonishing!
I really enjoyed the composition for its dynamic shifts. It keeps one such as myself interested and expectant throughout. One minute it was suspenseful, then chaotic, then triumphant, and then back to a suspenseful, hidden feeling towards the end. A truly exciting sequence!
The introduction has a classic menacing feel that combines very nicely with that background bass-filled rumbling which indeed represents an eerie advance or, as your track title implies, a fearful surfacing.
The intensification at 0:46 struck me as the revealing of Cthulhu, and it was powerfully orchestrated. I can imagine the hideous entity that ol' Cthulhu is roaring about to music like this!
The pounding percussive elements also added to the sense of panic, the 'impossible size' of a classic monster and generally accompanied the whole 'Argh!' factor of that part very well. It really does sound like a part for an encounter/confrontation with a gigantic beast.
There isn't much else I can say on this piece, simply because I find it harder to break down music like this, with all its different changes in emotion and feel.
What I will say is that the track you set out to create conquers the theme of an underwater terror. This track IS Cthulhu. I've noticed your name around the audio portal before, but this one has made me a fan. Keep it up and the best of luck in Round 2!
5/5