In spite of the important role of fish in the marine environment, where they are important members of the community acting on its structure through processes of predation, competition, and territoriality (Sale, 1991), little is known about the genetic evolutionary processes leading to such diversity (Nelson, 1994). For instance, absence of biological information makes it difficult to handle the conservation of a significant biodiversity reserve (Norse, 1993). The fauna inhabiting the reefs is very specialized, with intricate evolutionary patterns of predator-prey (Floeter et al., 2004) and competitive interactions among the species (Robertson, 1984; Harrington, 1993). These characteristics are reflected in an exuberant diversity of forms and colors, as well as, in some cases, diverse dynamics of karyotype differentiation patterns.