1.The image looks really flat, because your reflective light on the other side of your light source, is the same saturation. Need to dial it back so it gives it depth.

2. Most wings are transparent, so I would just take the wings to a different layer and drop the opacity.

3. Most water in that type of environment is actually very clean, so I would change the value to more a blue, and really lower the opacity.

Other than that, still looks good.