I agree the sword doesn't look sharp, I had a bit of trouble with that. I used a lot of dithering because of the restricted color palette and also because I think it gives it a nice texture.
It looks nice, though the sword doesn't look very sharp.
Why so much dithering?
Thanks for the feedback. I made an edit to better define the edges of the fin. What do you think?
Nice, but the dorsal fin is somewhat hard to see as it mixes with the background - it doesn't stand out. I think you should make the edges more defined.
The dithering is neat. Really makes it look scaley.