Like all members of the genus Synodontis,
S. nebulosus 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 help to identify
the species. In S. nebulosus, the humeral
process is as broad as it is wide, with a pointed
back end. All members of Synodontis 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. nebulosus, the
toothpad forms a short and broad band. On the lower
jaw, or mandible, the teeth of Synodontis
are attached to flexible, stalk-like structures and
described as "s-shaped" or "hooked".
The number of teeth on the mandible is used to differentiate
between species; in S. nebulosus, there are
about 18 teeth on the mandible. Habitat:
Found in the middle Zambezi River basin, as well as
the Pungwe River and Buzi River. It inhabits rivers
and floodplains, favoring floodplains, but does not
occur in rocky areas. Colouration:
The base body colour is yellowish green, with ill-defined,
irregular brown to black spots. The underside of the
fish is yellowish white. The fins are yellowish green
with black spots. Reproduction: The
reproductive habits of most of the species of Synodontis
are not known, beyond some instances of obtaining
egg counts from gravid females. Spawning likely occurs
during the flooding season between July and October,
and pairs swim in unison during spawning. The growth
rate is rapid in the first year, then slows down as
the fish age. Diet: As a whole, species
of Synodontis are omnivores, consuming insect
larvae, algae, gastropods, bivalves, sponges, crustaceans,
and the eggs of other fishes.
basin, middle and lower part. Type locality:
Tette [Zambezi River, Mozambique].
Boulenger, George Albert
(1909). Catalogue of the fresh-water fishes
of Africa in the British museum (Natural history).
London: British Museum. pp. 423–424. Froese, R. and D. Pauly. Editors.
2011. FishBase. World Wide Web electronic publication.
www.fishbase.org, version. H. M. Bishai & Y. B. Abu Gideiri
(1965). "Studies on the biology of genus Synodontis
at Khartoum". Hydrobiologia. 26 (1–2):
Skelton, P.H. 1993 A complete guide to the
freshwater fishes of southern Africa. Southern Book
Publishers. 388 p.