|Cat-eLog Data Sheet|
|Scientific Name||Synodontis obesus Boulenger, 1898|
|Common Name||Coas Synodontis|
|Type Locality||Opobo River, Old Calabar, Nigeria.|
|Pronunciation||sin oh don tiss|
|Etymology||According to Cuvier, Synodontis is an "ancient name for an undetermined fish from the Nile". It is apparently not derived, as often reported, from syn-, together and odous, tooth, presumed etymology of the lizardfish genus Synodus and in reference to the closely-spaced lower jaw teeth of both genera. This specific epithet literally means fat (obeseus,-a=fat).|
|Size||320mm or 12.6" 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.|
|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 punctured by the sharp fin spines (which hurts - be careful). 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. It 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||There is some debate over the species name. ‘Obesus’ is a Latin adjective (meaning fat) that, according to nomenclatural rules, should be declined to agree with the gender of the genus. As Synodontis is feminine and obesus is masculine, the species name should be declined as obesa (feminine form of obesus). However, current scientific literature continues to treat the specific epithet as masculine, even though epithets for almost all other Synodontis species have been declined to their feminine forms. The cause of this is unknown.|
|Distribution||Africa: various coastal drainages of the Bay of Guinea from Ghana to Gabon; basins of the Comoë, Pra, Volta, Momo, Cross, Wouri, Sanaga Nyong?, Kribi and Lobé Rivers. Also known from the Cross River in Nigeria
African Waters, Côte de Ivoire Waters, Comoé (click on these areas to find other species found there)
African Waters, Volta (click on these areas to find other species found there)
African Waters, Pra (click on these areas to find other species found there)
African Waters, Cross (click on these areas to find other species found there)
African Waters, Cross, Momo (click on these areas to find other species found there)
African Waters, Cameroon waters, Sanaga (click on these areas to find other species found there)
African Waters, Cameroon waters, Nyong (click on these areas to find other species found there)
African Waters, Cameroon waters, Wuori (click on these areas to find other species found there)
African Waters, Cross, Kribi (click on these areas to find other species found there)
African Waters, Cross, Lobé (click on these areas to find other species found there)
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|IUCN Red List Category||Least Concern, range map and more is available on the IUCN species page. Last assessed 2009.|
|Temperature||24.0-28.0°C or 75.2-82.4°F (Show species within this range)|
|Breeding Reports||There is no breeding report.|
|Reference||Annals and Magazine of Natural History (Series 7) v. 2 (no. 11) (art. 49), pp 415.|
|Registered Keepers||Keeping this species? Why not .
There is but a single registered keeper, view all "my cats" data.
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|Spotters||Spotted this species somewhere? Click the binoculars!
There are 2 records of this fish being seen, view them all.
|More on Synodontis obesus|
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|Last Update||2019 Oct 08 07:54 (species record created: 2005 Aug 21 00:00)|