evidence: The main rivers are the lower Sanaga, Nyong, Ntem, Benito, and northern tributaries of the Ogooué (Abanga, Okano, and Ivindo). [...] This ecoregion is defined by coastal rivers of the West Coast Equatorial bioregion (lower Sanaga, Nyong, Ntem, Benito, and northern tributaries of the Ogooué) which are characterized by similar fish species assemblages. The short stretch of falls on the [...] Fair. Roman (1971)) (Roman 1971)published a book on the fishes of Rio Muni (Equatorial Guinea) and Kamdem Toham (1998) and Kamdem Toham and Teugels (1998) (Kamdem Toham 1998; Kamdem Toham and Teugels 1998)studied the fish biodiversity of the Ntem River. Other taxa are less well studied.