Morphological and anatomical characterization of the digestive tract of Centropomus parallelus and Centropomus undecimalis - doi: 10.4025/actascibiolsci.v35i4.14352. Acta Sci. Biol. Sci. 2013;35(4):467-474. doi:10.4025/actascibiolsci.v35i4.14352