AquaticRepublic.com - Liosomadoras oncinus (Auchenipteridae) All Fishes

Adult
Juvenile
From Schomburgk, 1841
Dorsal view
Eggs
One day old fry
One week old fry
Six week old juvenile
Close-up of pectoral fin ray
Ventral view
Close-up of body pattern

All Fishes Data Sheet
Scientific Name	**Liosomadoras oncinus** (Jardine, 1841)
Common Names	Jaguar Catfish Jaguarmalle (Denmark), Jaguarwels, Onca (Germany)
Type Locality	Padauiri River, Brazil.
Synonym(s)	Arius oncinus, Liosomadoras orcinus, Lisomadoras oncinus
Pronunciation	lie oh SEW ma DOOR uss - ONN sin uuss
Etymology	From 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)
Species Information
Size	170mm or 6.7" SL. Find near, nearer or same sized spp.
Identification	A 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.
Sexing	Sexually 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 Remarks	A 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.
Habitat Information
Distribution	South America: Branco River basin. 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) Orinoco, Upper Orinoco, Ventuari (click on these areas to find other species found there) Orinoco, Middle Orinoco, Atabapo (click on these areas to find other species found there) Amazon, Middle Amazon (Solimoes), Negro, Upper Negro, Casiquiare (click on these areas to find other species found there) Amazon, Middle Amazon (Solimoes), Japurá, Caquetá (click on these areas to find other species found there) Amazon, Middle Amazon (Solimoes), Negro, Lower Negro, Branco (Roraima) (click on these areas to find other species found there) Login to view the map.
IUCN Red List Category	Least Concern , range map and more is available on the IUCN species page. Last assessed 2020.
pH	5.6 - 7.2
Temperature	20.0-28.0°C or 68-82.4°F (Show species within this range)
Other Parameters	Care 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.
Husbandry Information
Feeding	Accepts a wide variety of foods. Larger frozen foods are preferred. Should be fed when the tank is dark or dimly lit. User data.
Furniture	Provide 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.
Compatibility	In general a peaceful fish. It will however fiercely defend its hiding spot against intruders.
Suggested Tankmates	Other peaceful fish that are too large to swallow. Enjoys the company of its own species.
Breeding	A 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.
Breeding Reports	There is no breeding report.
Further Information
Reference	The Natural history of fishes of Guiana, pp 173, Pl. 4.
Registered Keepers	There is but a single registered keeper, view all "my fish" data.
Wishlists	Love this species? Click the heart to add it to your wish list. There is no wish to keep this species.
Spotters	Spotted this species somewhere? Click the binoculars! There are 11 records of this fish being seen, view them all.
Forum BBCode

	Look up L. oncinus on PlanetCatfish.com
	Look up L. oncinus on Fishbase
	Look up L. oncinus on Encyclopedia of Life
	Look up L. oncinus on Global Biodiversity Information Facility
	LFS label creator ARN ref:1.22.79.173
Last Update	2020 Sep 19 02:17 (species record created: 2001 Apr 13 00:00)