The Poeciliidae or Livebearing tooth-carp family originated from North, Central, and SouthAmerica, but now can be found worldwide, as they have been introduced for mosquito control.The fish of the Poeciliidae Family arethe best-known of all aquarium fish due to their relative ease of keep, and the many colorful, cultivated varietiesavailable.
Live-bearers are highly developed on an evolutionary scale, and their adaption gives theirlive young an advantage over egg-laying species.The genera of Poeciliidae that are most commonly kept in aquaria are Belonesox, Limia, Poecilia , and Xiphophorus .