Guess the photo by placing your thoughts in the comments. I'll post the answer there in a day or so.
The above image is....
1.) An abstract photo featured on the excellent blog i heart photograph 2.) A newly-discovered strain of colorful sea anemones 3.) Brain cells of a lab mouse glowing with fluorescent proteins 4.) An image from David Maisel's newest series 5.) A behind-the-scenes look at the newest candy in development at Nestle's Willy Wonka Candy Company
UPDATE (10/11): Look in the comments for the answer!!