Photo Rejection - Quality - Clathrus Archeri (Devils Fingers (Stinkhorn) - What needs improving?

I agree with George that it's not in sharp focus. 

1. The photo is not sharp

2. Too dark

3. The white balance is too cold for me

When examining at 100%, I believe the sharpness could be improved, and there was noise visible while zoomed in as well.  Try exploring camera settings that allow for a higher shutter speed and lower ISO.  The histogram was spot on with this photo though.