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This study is focused on areas around Lagos lagoon, a water body in the heart of the metropolis. Lagos lagoon cuts across the southern part of the metropolis, linking the Atlantic Ocean (in the west and south) and Lekki lagoon (in the east). It is about in area and 285km in a perimeter. The lagoon provides places of abode and recreation, means of livelihood and a sport, dumpsite for residential and industrial discharges and a natural shock absorber to balance forces within the natural ecological system. The study areas fall within the tropical rainforest belt. The climate is characterized by alternate wet and dry seasons. Temperature ranges from a mean maximum of 33.9•c in February to a mean minimum of 23.4•c in August (Akintunde et al, 2017) with high relative humidity throughout the year standing at above 83% most of the time. The drainage pattern of the area around the Lagos lagoon is basically dendritic and trellis. The drainage system around this area is very effective on slopes and through several rivers and canals that flow into the Lagos lagoon (Odumosu, 1999).The study area is situated on the Africa Tectonic plate eastern Dahomey basin which percepts one of a series of west African Atlantic Margin that was originated during the period of rifting in the late Jurassic to early Cretaceous (Whiteman, A., 1982.). The sedimentary basins include; Dahomey Basin (part of the study area), Niger Delta Basin, Anambra Basin, Chad Basin, Mid-Niger Basin, Iullemeden Basin and Benue Trough. The Dahomey sedimentary basins which is one of the continental margins of the Gulf of Guinea, It is delimited to the west by the Ghana ridge, which is an addendum of the Romanche Fracture Zone; on the east by the Benin Hinge line, a basement fortification which disjunct the Okitipupa Structure from the Niger Delta Basin and also marks the continental fortification of the Chain Fracture Zone (Wilson and Williams, 1979) 7The study areas fall within the tropical rainforest belt. The climate is characterized by alternate wet and dry seasons. There are differential salinity in the lagoon due to the effect of Atlantic Ocean and fluctuates both seasonal and semi-diurnally. Extensive twenty-five locations around the Lagos lagoon was studied. These proxy areas are located within 20km to the lagoon. They are Ikosi, Ejirin, Ijede, Ajah, Sangotedo, Epe, Eleko beach, Orimedu, Ilumawfin, Ebute-Lekki, Ilagbo, Ita-oko Island, Ode-Omi, Iwopin, Ofin, Ibese, Bayiyeku, Odogun, Oworonkoki, Adebempe/Unilag, Makoko, Tin Can Island, Amowo-Odofin, Badagry, Yawa. 

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