INTRODUCTION
Freshwater fishes in Malaysia are relatively diverse with approximately 470 species of primary freshwater fishes comprising 15 families have been recorded in Malaysia (Chong et al, 2010) and more than 200 species can be found in Peninsular Malaysia (Ismail and Sabariah, 1995). According to Zakaria-Ismail (1994), species composition of freshwater fish in Peninsular Malaysia is heavily influenced by Siamese and Indonesian elements. Peninsular Malaysia is bounded by Thailand in the north and Indonesian archipelago in the sout