Abstract
Belonging to the Order Perciformes, Cichlidae family is considered the most numerous family of non-fish Ostariophysi, with an estimated 571 freshwater species occurring in Brazil, among them those of the genus Cichla, popularly known as peacock bass. The cichlids are endemic to the Amazon basin, Araguaia and Tocantins, but were introduced in the basins of the Northeast, São Francisco, Par…