Great work, i really likes how much you pushed the lightning contrast. You have also sacrificed some of the local values on the fish for the sake of better composition. This shows me that you are already thinking about the compositional values , instead of just making it as real as possible. For the feedback, i am observing that you have really tried to use the same contrast all throughout the artwork. Also the tail of the mermaid looks like as if it is sort of "Pushed in" in the artwork. Naturally, for a twisted organic form, it really should not be in such a stretch untill its a noodle. So, there are two the things i would suggest for correction . First , always build up bending forms by combining simpler forms (at least untill it becomes intuitive) . Second, when doing a artwork , always try out multiple types of composition before settling on one and finishing it. This applies for deciding not only the basic composition of the scene, but also its value composition. For a 2 your artwork, about 15 minutes of very rough composition exploration should be about enough. As a tip for speed, you can actually do composition exploration without form, without colour, just Plane black and white values on a simple gesture drawing with cross contours as i did here should be enough | Artwod Feedback