I like your undersea structures and that. Also, I really like your depth haze and the colours. My only suggestions would be to reduce some of the brightness coming from the light that you can see through the hole in the coral in the midle of the pic, but thats a personal taste kind of thing. Also, maybe try making the edges of the solid light a little softer and not so sharp. Apart from that, nice job.

Dreams are just nightmares on prozac...
Digital WasteLanD