This book is aimed at enthusiasts of various, sometimes rare wild forms, as well as fans of guppies, platies, mollies, and swordtails. The breeding standards that are so important for these easily breedable fish, along with excellent guidelines for "creating" new fish in terms of shape and color, are a core aspect of this monographic book, which not only identifies wild forms but also allows for the precise naming of breeding forms. With many illustrations, the author documents the diversity, distinguishes between what is meaningful and meaningless in aquaristics, provides advice on proper breeding including selection, and reports on the habitats of these popular aquarium fish. A standard work in every sense!.