Once upon a dream...

I stumbled upon your artwork and its really the kind of art I love and try to make as well: mysterious, original, cute and poetic.
The first think that attracts the viewer I think is the appearant ''surreallism'' of the scene. It's mysterious but it all seems natural at the same time. The calm pose of the girl and the funny smile of the fish make provide a calm atmosphere to your drawing even if we usually associate deep sea to darkness and fear. The great work on coloring and the glowing effect adds to this mysterious ambiance. Oh, and I also love the bubbles ^^.
The only thing that perhaps would have enhanced the effect you were looking for ven more is perhaps to have ''zoomed out'' the view some more, in order to increase the contrast of sizes between: the girl, the fish and the sea. And perhaps you could have added a bit more details and use thiner/clearer lines on the girl (or use less blurring effects) to really separate the foreground (the girl) from the 2 backgrounds (Fish and sea). In my opinion with digital work, it's the best way to give depth to a drawing. But it's only my opinion, and it's really a great composition that is both joyful and inspiring. Congratulations!