Pictures of other species here
A male metalic livebearer.
Female metalic livebearers are considerably bigger than males.
Fishkeeping Facts and Tips
Well planted aquariums are not only great looking, they are also very beneficial to the fish. They oxygenate the water, absorb nitrates, reduce algae and provide refuge for fry (and other timid species). Plants like Java fern, hornwort, Amazon sword, Vallisneria (eel grass), Cryptocoryne and Anubias can all do well in a typical home aquarium with the smallest amount of attention
Have a look at some of these related sites