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as you said, colors are strong but i think that it needs some depth, it seems a bit to plain right now, but with some smal corrections i think you can give it some more depth.
i want that fish to stand out more than it does, maybe there's to much going on around it?
I agree with Failoniir.
I like the colors, too, though. And the textures. Nicely done!
Very nice. Too much dodge though up in that left corner shining down. I know it is supposed to be sunlight shining down through the water, however, I think that it is too high of a dodgetool usage. Maybe put a blue layer over it and then go from there to see what else can be done to understate the light a bit. Not alot, just a little, I think it would make that beautiful fish "pop" more.
Honest, I don't try to be an asshole, it just happens!