Livebearers focuses on four families of fish which contain many of the most attractive and popular species in the tropical fish hobby today, including guppies, mollies, swordtails, and platies. The families include Goodeidae (Mexican livebearers), Anablepidae (four-eyes and others), Poeciliidae (guppies and others); and Hemirhamphidae (halfbeaks). Author David Alderton explains that hobbyists have applied the term livebearer to these four families...