INTRODUCTION The riverbream or perch, Acanthopagrus berda (family Sparidae), is widespread in the tropical Indo-Pacific region, occurring from South Africa to India, northern Australia and Japan (Smith & Heemstra 1986; Garratt 1993). In South Africa it is found along the east coast, where its range extends southwards to Port Elizabeth (33°58’S, 25°36’E). It is one of 22 species of fishes found ...
