Cat-eLog Right Arrow Mochokidae Right Arrow Mochokinae Right Arrow Synodontis

Jump to next section Cat-eLog Data Sheet
Scientific Name Synodontis woosnami  Boulenger, 1911
Common Names Upper Zambezi Squeaker
Bo-zambesi-skreeubaber (South African), Bubblebarb Squeaker
Pronunciation sin oh don tiss
Etymology Synodontis: From the Greek syn, meaning together, and odontos, meaning tooth; in reference to the closely-spaced lower jaw teeth. 
Jump to next section Species Information
Size 205mm or 8.1" SL. Find near, nearer or same sized spp.
Identification All species in the genus Synodontis have a hardened head cap that has attached a process (humeral process) which is situated behind the gill opening and pointed towards the posterior. The dorsal fin and pectoral fins have a hardened first ray which is serrated. Caudal fin is always forked. There is one pair of maxillary barbels, sometimes having membranes and occasionally branched. The two pairs of mandibular barbels are often branched and can have nodes attached. The cone-shaped teeth in the upper jaw are short. S-shaped and movable in the lower jaw. These fish produce audible sounds when disturbed rubbing the base of the pectoral spine against the pectoral girdle.

Has the average build of the genus with a high dorsal fin. Most characteristic features are a broad, deep humeral process without a distinct point, slender simple barbels, mandibular barbels with filamentous branches and primary and secondary premaxillary teeth not separated. Mandibular teeth 14-24 in a narrow semicircular band, no distinct ventral shelf to the premaxillary toothpad, a single row of 11-12 tertiary premaxillary teeth. Maxillary barbels have a narrow dark basal membrane. Dark brown above, pale brown below,markings variable, generally smallish spots on body with underside of head and abdomen clear, some individuals with larger spots including oblong markings (more common in Cunene specimens), the fins exhibit small dots.
Sexing First lay the fish in your hand with its head toward your palm and the tail toward your fingers. Hold the dorsal spine between your middle and ring finger so the fish is belly up and you won't get stuck (Which by the way, hurts like crazy!). The genital pore is in a small furrow of tissue (in healthy fish) and will be obstructed by the pelvic fins. Pull down on the tail gently to arch the fishes spine and the pelvic fins will stand and the furrow open to display the genital pore and the anus of the fish. The male has a somewhat ridged genital papillae on which the spermatoduct is on the back side, facing the tail fin. A gravid female will also show an extended papillae but the oviduct is on the ventral side of the papillae (And may also show a little redness if really gravid). A thin or emaciated female will have just two pink pores, the oviduct and the anus.
General Remarks It appears that this species prefers larger backwaters, lakes, and similar bodies of water in the floodplains of rivers it inhabits.
Jump to next section Habitat Information
Distribution Africa: Upper Zambezi, Okavango basin and Cunene river.
African Waters, Zambesi, Upper Zambesi (click on these areas to find other species found there)
African Waters, Okavango (click on these areas to find other species found there)
African Waters, Cunene (click on these areas to find other species found there)
IUCN Red List Status Least Concern
Jump to next section Husbandry Information
Breeding Unreported.
Breeding Reports There is no breeding report.
Jump to next section Further Information
References Skelton, P. (2001) A Complete Guide to the Freshwater Fishes of Southern Africa. Struik pg.252. Seegers, (2008) The Catfishes of Africa pg.510.
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Last Update 2013 Jul 19 18:22 (species record created: 2010 Jan 27 16:25)