For my blog I decided to research tropical fish and their colors. This led to reading a surprisingly interesting article about a fish study concerning how color affects species development. The study was conducted by McGill University and the Smithsonian Tropical Research Institute and it involved watching how hamlet fish, also known as Hypoplectrus, of certain colors interacted behaviorally with others of similar and of different colors.
They found that both mating and feeding behaviors had a correlation to the color of the fish. They found that fish of similar colors would mate together, thereby creating more and contributing to the development of a new species over time by creating a distinct genetic pattern. In addition to mating behavior, they found that the fish used their color to their advantage for feeding purposes. The predatory Hypoplectrus fishes would track their prey (which were non-predatory fish) by choosing prey of a similar color pattern to its own. This is because the non-predatory fish are usually not frightened of other non-predatory fish, and by blending in to the others, the predatory Hypoplectrus allowed itself to be "camouflaged" in a sense.
The researchers eventually came to the conclusion that the thirteen different colors of fish were all evolving into different species. Most species classifications are usually based on environmental factors such as climate, that thereby affect the behavior and evolution of the animal. Genetic variations alone in the genus of animals is also not enough to classify them as separate species if they don't have any known behavioral differences. However, these were all coral reef tropical fish, but due to their own color and the resulting behavior they could be classified as different species.

Sources:
http://www.sciencedaily.com/releases/2007/06/070612142947.htm
http://journals.royalsociety.org/content/w574701gp8255474/?p=8a005fba211341a9a48fbdfc09257c44&pi=8