This photo shows the emphasis of the dominant predator. There are many baitfish around the shark. The baitfish are swimming from the main predator. In certain ways this shows emphasis with in unity. The colors are all matching in the same spectrum of colors. But the shark stands out as being a natural contrast in colors. The shark has also formed a ball or circle of baitfish around him, Yes I am assuming it's gender :)


By Paul Wilkinson
http://www.nationalgeographic.com/photography/photo-of-the-day/2011/7/blacktip-reef-shark/