Only one suggestion: the background is a bit too distracting because of the bright spots. Two ways of overcoming this:
1. Easy way - if you have someone with you, ask him/her to get a big piece of leave and put behind the spider to block the light.
2. Harder way - set to aperture priority mode and use very narrow aperture (high aperture value), then use fill flash to take the shot. This will make the background darker.