Synodontis khartoumensis
Synodontis khartoumensis is a species of upside-down catfish that is native to the Democratic Republic of the Congo, Sudan and Uganda where it occurs in Lake Albert and the Nile basin. It was first described by Yousif Babiker Abu Gideiri in 1967. The original specimens were obtained in the Blue Nile, about 2 miles away from the confluence of the Blue Nile and the White Nile, near Khartoum, Sudan. The species name khartoumensis is derived from the city of Khartoum, where the type species was originally found. Description Like all members of the genus Synodontis, S. khartoumensis has a strong, bony head capsule that extends back as far as the first spine of the dorsal fin. The head contains a distinct narrow, bony, external protrusion called a humeral process. The fish has three pairs of barbels. The maxillary barbels are on located on the upper jaw, and two pairs of mandibular barbels are on the lower jaw. The adipose fin is large and the tail, or caudal fin, is forked. The front edges of the dorsal fins and the pectoral fins are hardened into stiff spines. These spines can be raised into position at right angles to the body and