Cat-eLog Right Arrow Auchenipteridae Right Arrow Auchenipterinae Right Arrow Liosomadoras

Jump to next section Cat-eLog Data Sheet
Scientific NameLiosomadoras oncinus  (Jardine & Schomburgk in Schomburgk, 1841)
Common NamesJaguar Catfish
Jaguarwels, Onca (Germany)
Type LocalityPadauiri River
Synonym(s)Arius oncinus
Pronunciationlie oh SEW ma DOOR uss - ONN sin uuss
EtymologyFrom the Greek leios, meaning smooth, soma, meaning body and Doras (a genus of doradid catfishes); in reference to the lack of bony plates on the body (when the genus was described as a doradid). Oncinus from the Latin name of this species namesake, the Jaguar (Panthera onca)
Jump to next section Species Information
Size 250mm or 9.8" SL. Find near, nearer or same sized spp.
IdentificationA beautiful, Jaguar-style, patterned fish that is unmistakable. This species is widely distributed but doesn't appear to show any great difference in appearance between populations from different origins.
SexingSexually mature males have a genital papilla which is a modification of the anal fin, they also have thicker and more robust dorsal and pectoral fin spines. Harder to sex younger individuals.
General RemarksA species that becomes active at late dusk and remains so until first light. Spends all of the daytime crammed into a dark spot in the aquarium, or, in nature, driftwood crevices and holes. Liosomadoras is the only genus in Auchenipteridae with a postcleithral process, which is the reason this genus was previously placed in Doradidae.
Jump to next section Habitat Information
DistributionSouth America: Ucayali, Amazonas and Negro river basins.
Amazon, Middle Amazon (Solimoes), Negro (click on these areas to find other species found there)
Amazon (click on these areas to find other species found there)
Amazon, Upper Amazon, Marañón, Ucayali (click on these areas to find other species found there)
Show it on a map (Click the map-icon to show/hide map of species distribution)
IUCN Red List StatusLeast Concern
pH5.6 - 7.2
Temperature20.0-28.0°C or 68-82.4°F (Show species within this range)
Other ParametersCare is required with this species upon import as it is not often clear what water parameters (in the wild) it is used to. It's a reasonably hardy fish, so best to acclimatize in pH of around 6.4-6.6 if the origin is unknown.
Jump to next section Husbandry Information
FeedingAccepts a wide variety of foods. Larger frozen foods are preferred. Should be fed when the tank is dark or dimly lit.
FurnitureProvide many hiding spots as this fish is very shy and nocturnal if kept in well lit aquaria. Lots of wood, floating plants and dim lighting will allow the fish to feel more comfortable.
CompatibilityIn general a peaceful fish. It will however fiercely defend its hiding spot against intruders.
Suggested TankmatesOther peaceful fish that are too large to swallow. Enjoys the company of its own species.
BreedingA few undocumented reports of egg laying in this species were all that existed before 2014. Was bred in captivity by US aquarist Jeremy Basch who provided the images documenting eggs and fry development shown here.
Jump to next section Further Information
ReferencesFish British Guiana I - pp173 - Pl. 4
Neotropical Ichthyology, 10(1): 1-11, 2012
Registered Keepers(1) Kenneth Wong, (2) lordotterby, (3) CatBrat, (4) synoguy, (5) mikelouth, (6) Occellatus, (7) soltarii007, (8) TP (k: 5), (9) ani-mal-lvr (k: 2), (10) Kattes (k: 4), (11) Osiris, (12) Birger (k: 4), (13) daniel60 (k: 2), (14) Koltsix (k: 3), who also notes: "Got three of these living peaceably with stingrays and some wood cats. Only one a large male defends his cave against all comers while head-butting the intruder and emitting a very audible grunt.", (15) ChileRelleno, (16) shawntraviss, (17) Tommi (k: 2), (18) smegforbrains, (19) GW_NL, (20) ali12345, (21) Schmike, (22) Martin S (p: 3, k: 4), who also notes: "Richard B's", (23) Kennye86, (24) allim, (25) The.Dark.One, (26) scotty105 (k: 2), (27) liam..essex, (28) Altifrons, (29) nvcichlids (k: 13), (30) raymgnz215, (31) Junttis (k: 4), (32) danny.450, (33) Persephone, (34) PeterUK (k: 2), (35) markhinch (p: 2), (36) miles3, (37) Djthomas, (38) cory777, (39) Bijn, (40) Bisclavret, who also notes: "I LOVE this catfish! It loves me feeding it Krill as well. I named it "Houdini" because it will be one place one minute, and somewhere else the next", (41) arthos (p: 2, k: 4), (42) MilkMan, (43) MatsP, who also notes: "Dummy for testing...", (44) maynard1982 (k: 2), (45) arapaimag (k: 2), (46) redfan, (47) zigster (k: 2), (48) isterlingi, (49) limz_777, (50) jeepn4x4, (51) Decker504, (52) wrasse (k: 3), (53) knifegill, (54) miguel mitchel, (55) Floody, (56) irshprncsk, (57) mr bulldog, (58) Gandalfdgrey, (59) DavidNMaddieHaveCats, (60) NickFishnut, (61) kiwidu21, (62) Sabaji, (63) JasonMDann, (64) cory-ap2, (65) Marshal, (66) BullFishkeeping, (67) Gulper, (68) Jordanlewis100.

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Breeding ReportsNone.
Article - CotM 2008 October
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Last Update2014 Aug 13 23:05 (species record created: 2001 Apr 13 00:00)