Normal metaphase complements of A. testudineus(PM 1) were carefully examined for any possible clastogenic/ mutagenic change due to treatments with the test chemicals or distilled water. Representative photomicrographs of various types of chromosomal aberrations like, chromatid break (PM 2), ring (PM 3), pulverization (PM 4), acentric fragment (PM 5), terminal association and stretching (PM 6), etc. have been provided mainly from different treated fishes