Synodontis woosnami, known as the Upper Zambezi squeaker, or bubblebarb squeaker, is a species of upside-down catfish that is native to Angola, Botswana, Namibia, Zambia and Zimbabwe where it is found in the upper Zambezi and Okavango River basins and the Cunene River. It was first described by British-Belgian zoologist George Albert Boulenger in 1911, from a specimen collected in the Okavango River in the Lake Ngami district of Botswana. The species name woosnami is derived from R. B. Woosnam, the collector of the first specimen. Description Like all members of the genus Synodontis, S. woosnami 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 shape and size of the humeral process helps to identify the species. In S. woosnami, the humeral process is slightly longer than it is broad, without a distinct point on the end. 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 maxillary barbel is long and straight without any branches, without a membrane at the base. It extends about of the length of the head. The mandibular barbels have long, slender branches, and the outer pair is about as long as the inner pair. The front edges of the dorsal fins and the pectoral fins of Syntontis species are hardened into stiff spines. In S. woosnami, the spine of the dorsal fin is about the length of the head, slightly curved, smooth in the front and serrated on the back. The remaining portion of the dorsal fin is made up of seven branching rays. The spine of the pectoral fin is as long as the dorsal spine, and serrated on both sides. The adipose fin is times as long as it is deep. The anal fin contains four unbranched and 8 branched rays, and has a rounded appearance. The tail, or caudal fin, is deeply forked. All members of Syndontis have a structure called a premaxillary toothpad, which is located on the very front of the upper jaw of the mouth. This structure contains several rows of short, chisel-shaped teeth. In S. woosnami, the toothpad forms a short and broad band. On the lower jaw, or mandible, the teeth of Syndontis