Pacific Pomfret Brama japonica Hilgendorf, 1878 is a migratory pelagic fish of Pacific Ocean. Between August and September 2011, 51 specimens of B. japonica were obtained in Fishing Terminal of Chorrillos, Lima, Peru for the evaluation of: (1) ecological indices of the parasite components of the metazoan fauna of B. japonica, and 2) aggregation and selectivity of ectoparasites and endoparasites most prevalent in B. japonica. The parasites were collected and counted using standard protocols. The ectoparasitic copepod Hatschekia conifera Yamaguti, 1939 had the highest P (prevalence), MI (Medium Intensity), ANA (Abundance Numeric Average) and IEN (Specific Importance Numerical). The endoparasite Hepatoxylon trichiuri (Holten,1802) Dollfus, 1942 presented the highest values of VAA (volumetric average abundance) and VEI (Volumetric specific importance). In H. conifera, H. trichiuri and Koelli...