A Comparison between Tilapia zilli (Gervais, 1748) (Preciformes: Cichlidae) and Common Carp Cyprinus carpio (Linnaeus, 1758) (Cypriniformes: Cyprinidae) by Staining Bone Technique

The method of staining bones is considered as one of the adopted means in studying the tissues and bones as well as the organs by which a comparison between fish species can be made as of Potthoff (Potthoff, 1984). The main objective of this study is to identify the tissue and skeleton differences between some species of fish which can enhance the taxonomic studies other than the taxonomic differences between the traditional and known kinds. The whole fish can be successfully stained or some parts of fish body such as bone and tissue by two clear colors as noted (Potthoff et al., 1977). In fish, the diagnosis after staining depends on the spine shape, fin rays branches in addition to the teeth, pharyngeal teeth, gill lamellae, branched and nonbranched anal fin, completed bone fins and fatty fins have no bones as it has been referred to (Coad, 2015). The distribution and diversity of bones shape give an important role to the emergence and development of fish species in addition to the different relations between these species as it illustrated (Doadrio, 1990). Information on these relations, emergence and development are available in different species of fish depending on the diversity and distribution of bones in the fish skeleton (Keivany et al., 1998; 2004; 2006; 2014a). The difference in distributing the internal muscles between the bones and connected with the joint tissues International Journal of Current Microbiology and Applied Sciences ISSN: 2319-7706 Volume 6 Number 6 (2017) pp. 459-467 Journal homepage: http://www.ijcmas.com