Doulah, M.A.U., Islam, S.M., Rahman, M.S., Islam, M.S., Rashid, M.H. or and Razzak, M.A. 2020. Investigation of parasite and diseases at cage culture Nile tilapia (Oreochromis niloticus) in Southern region of Bangladesh. Research in Agriculture Livestock and Fisheries. 6, 3 (Jan. 2020), 431–437. DOI:https://doi.org/10.3329/ralf.v6i3.44809.