I really like the sail/fabric thats billowing by the boat, its a very nice way to anchor the viewers attention to the piece just by simply having a small bit of orange against all the blue.
With what veroxid said, i think the tail could use a bit more polishing. It's a bit of a harsh turn and makes it look more like a paper figure than organic. Maybe having the main body turn a little more to make the transition to the bends a bit smoother? Only around where the tail connects with the body area so you don't have to do any large edits and see how that looks.
Other than that the piece is looking fantastic, I look forward to seeing your progress.