Ahh, looks so tranquil, and who knows - maybe Earth really was visited that far ago too The only thing I don't like is the reflection of the big island on the right, I would have gradually faded it off towards the bottom near that smaller, closer island
Nice scene with amazing Plesiosaurs. The underwater effect is really awesome. The only thing I'm not so keen about are the spaceships. In comparison to the rest of the picture they lack detail. (just my humble opinion). But it's a for sure.