Was very intrigued when I saw you couldn't put a genre to this! If I had to I would probably describe this as contemporary classical with a bit of an ambient influence.
Anyway, this was a really nice track, everything's really well recorded and mixed, especially great job with layering your voice into a choir. I really like the music you've written too and how you have a continuous feel of mystery whilst effortlessly gliding between a sense of wonder and one of looming danger.
I think you've done a good job of getting across the narrative you've described and there definitely is a sense of the ocean throughout, in a way it's a little reminiscent of pieces by Camille Saint Saens & Erik Satie that reference the sea/ocean.
Great job on the video too, I really enjoyed watching that.