Profile of heavy metals level in catfish (Hexanematichthys sagor) and green mussel (Perna viridis) from Kong Kong Laut, Johor Straits - Mohamat Yusuff, Ferdius @ Ferdaus; Liong, Swee Yun; Cheah, Eddie Kee Wan; Zulkifli, Syaizwan Zahmir (Department of Biology, Faculty of Science, Universiti Putra Malaysia, 2014)