Cactus & Ladybird

how do you like this?

I suspect that this shot might benefit from an off-centre composition -- the placement of the ladybug right smack in the middle makes the overall picture a little to static for my personal taste. Also, is that dust in the scan just below the bug, or is that dust on the cactus? It looks like some kind of film/scan artifact bujt I can't be sure.