The study examined the impact of physico-chemical parameters of four aquatic ecosystems in Badagry division, on morphometric distances (total length, standard length and body weight) and tissues (gill, muscle and small intestine) of Tilapia guineensis. Samples of water were collected for 18 months, while twenty wild adult Tilapia guineensis from each station were examined for histopathology using standard procedures.
Length- weight relationships of T. guineensis obtained from all the creeks showed that T. guineensis had negative allometry (b<3). Only samples from Ajegunle had condition factor (k) value less than 1.