The four-eye butterflyfish (Chaetodon capistratus) is one of hundreds of fish species which inhabit the reef environment of the Florida Keys. The butterflyfish mates for life and therefore you will often see two of them. If you can imagine two butterflyfish nose to nose, they look like a butterfly. It is easy to see how they got their name. (photo: Chris Huss - Florida Keys NMS)