Although they are not many in species, cichlid fishes are among the most economically important of fishes. They form a significant proportion of commercial catches that make their way to markets in large towns such as Iquitos and Manaus. The eyespot on the tail is a common feature among cichlids. The spot is believed to provide a diversion to misdirect the attack of a potential predator toward the tail. The species above is called Oscar (Astronotus ocellatus) and is prized for its tastiness. Note the red-bellied piranhas to the bottom right and left of the picture.