What a cool design! As feedback I would suggest to use your design as a reference and then try to make a new more dynamic pose, using the mannequin workflow. Then draw your design on top of that. For this render I think you could add scale to the tail, it's a bit difficult to see what material the legs and tail is. Check out fish on pinterest and check jens's video where he is rendering the scales and apply it to your own drawing. Keep | Artwod Feedback