Figure 1.

The squeaker catfishes (Synodontis) in East Africa. (a) Map of southern and eastern Africa showingthe Great Lakes in East Africa and the main river systems in thearea. (b) The upside-down catfish (S. nigriventris) is characterized by its inverse swimming posture. Photo courtesy of E. Schraml. (c) The cuckoo catfish(S. multipunctatus) from Lake Tanganyika is a brood parasiteof mouthbrooding haplochromine cichlids. Here, the mouth-content ofa breeding female of Simochromis diagramma is shown: Wefound five larvae of S. diagramma plus one larger cuckoocatfish larvae (Photo: W. Salzburger).