Well it will be an interesting business card.... In order to get the pic to business card diminsions I had to crop a tad off of the right side.
Attachment 17731
I think if you really want to use it... think about the shadow coming across the limb as a sweeping dark wave on which to print the most important words of the card..... either that or selectively darken more of the area under the shadow for more of a dark printing area... I would maybe darken that whole bottom right corner thru the shadow area
Dont know much about business cards or how hard it is to print text on multi-colored backgrounds. But I do know when I get a business card that is unusually cool, it gets saved every time... Good luck