Cat-eLog Right Mochokidae Right Mochokinae Right The genus Synodontis

Down Summary of synodontis
Pronounced sin oh don tiss
Etymology According to Cuvier, Synodontis is an "ancient name for an undetermined fish from the Nile". It is not derived, as often reported, from syn-, together and odous, tooth, presumed etymology of the lizardfish genus Synodus and refers to the closely-spaced lower jaw teeth of both genera.
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 fish's 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 gravid. A thin or emaciated female will have just two pink pores, the oviduct and the anus.
Size Smallest 44mm, largest 800mm, average 244mm, most commonly 500mm. All SL.
Species There are 159 "species" in the database
Keepers 94 species (59%) are being kept by registered keepers
New spp. / time
1750 1770 1790 1810 1830 1850 1870 1890 1910 1930 1950 1970 1990 2010 
Distribution

Login to view the map.
Down Most Kept Species
1.
Synodontis eupterusSynodontis eupterus
(15.43%)
2.
Synodontis nigriventrisSynodontis nigriventris
(8.36%)
3.
Synodontis multipunctatusSynodontis multipunctatus
(8.11%)
4.
Synodontis petricolaSynodontis petricola
(7.53%)
5.
Synodontis lucipinnisSynodontis lucipinnis
(7.02%)
6.
Synodontis decorusSynodontis decorus
(4.77%)
7.
Synodontis angelicusSynodontis angelicus
(4.35%)
8.
Synodontis ocelliferSynodontis ocellifer
(3.14%)
9.
Synodontis nigritaSynodontis nigrita
(3.05%)
10.
Synodontis schoutedeniSynodontis schoutedeni
(2.72%)
11.
Synodontis flavitaeniatusSynodontis flavitaeniatus
(2.55%)
Down Genus Thumbnails