Oreochromis niloticus and Puntius schwanenfeldii are commonly found in the Koto Panjang Dam. Around the dam, however, many anthropogenic activities produce heavy metal that enter the water and thus accumulate in the organisms living in that area. A study aims to understand the heavy metal content in gill, muscle and kidney of O. niloticus and P. schwanenfeldii living in that dam, as well as…