Againsttheflow: that's a beautiful image, and the bug-through-the-skull is true to the original Poe story, but, for our purposes it needs 'juicing' to get our message across. Perhaps you just need to make the skull more visibly apparent. Being way up on top there, it could get lost in the picture frame... Then (and you may hate this, as a creator) we need to tie this in with the cryptography in the story; so perhaps we add, in the foreground, an old cryptographic note as if it was dropped on the ground, or held right in front of us? Or overlaid against the picture in double exposure? Something...gotta get the code in there........The color of the bug is perfect in my monitor.
P.S. Just so you know, that image is so beautiful that I would use it even if you didn't fix it. Remember that there'll be a nameplate added down in the corner (see immediately previous posts). I imagine that since the name of this wonder, "The Gold Bug", is short & sweet, the small nameplate could be added without modification.