It's a special erectarod.
I like the guy, but the boat looks weird and the water is a bit pre-school style. I mean it can work if you have a clear design to go that way, but now it's conflicting. Google some boats and make it sink deeper, tilt it a bit to tell us that the guy has weight to him. Make the point where the fishing line meets the water visible to the viewer for more options to make it interesting. Make it a lake setting so you can put some tree line in the bg and vegetation in the water. Aaaand, do leave the dithering and antialiasing for the last. First work on the fundamentals. Those things don't really make a picture, they just add to the finish when you do have something that's great without them.