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This profile was written by Redfan an active contributor to the site.  

South america


Liosomadoras oncinus

Liosomadoras oncinus


    Liosomadoras oncinus is a very striking fish that really cannot be mistaken for anything else including the false Jaguar. Featuring a pattern that resembles quite literally a jaguar cat (feline) and like its name sake this fish can be quite predatory. A very shy fish that will only show itself during dusk and darkness, though after a month or two they will appear later in the evening if lighting subdued. Also, this fish will after time readily accept hand feeding (which is an experience like no other).

Quick stats:

    Listed tank sizes are the minimum
    Size: 7 - 10inches (17.8 - 25.4cm)
    Tank: Juveniles and Sub adults (up to 9 months) can be kept in a 30G tanks Adults should be kept in upwards of 50G tanks.
    Strata: Will go everywhere but predominantly bottom. Likes Sand - Fine Gravel.
    PH: 5.6 - 7.2
    Hardness: dh range 0-15dH
    Temperature: 68°F to 82°F (20°-28° C) Though generally accept optimum around 77°F to 79°F (25 - 26° C)


    Order: Siluriformes
    Family: Auchenipteridae
    Genera: Liosamadoras
    Species: oncinus


Common name:

    Jaguar catfish

Image gallery:
    Additional species photographs


    Badmans' Forum


    South America: Branco River basin in Brazil.

General Body Form:

    Quite a rotund shape featuring a classic catfish mouth. Despite its shape this fish is extremely quick especially when hunting.


    Liosomadoras oncinus

    Liosamadoras oncinus is generally a golden brown colour with squared black markings and a thick white line running down from head to tail.

    The Jaguar is a smooth skinned fish so should not be kept with anything that may potentially attack it (cichlids etc). This fish can be kept with tetra that are of the wider shape (lemons etc) and can be kept with smaller plecs as long as every bottom feeder has it's own wood / pipe to hide in. Some debate exists as to keeping more than 1 of these together, however most feel that with adequate hiding spaces and a Amazonian biotope tank it can work quite well. The Jaguar is always wild caught and care has to be taken if importing directly from South America re PH level (a ph of 6.5 is recommended if this is the case).
Jaguar Catfish
Click on photo to see a short video of the authors catfish.

    This fish is very greedy and will happily eat more than it needs so care needs to be taken. It will accept bloodworm, catfish pellets and really loves occasional chopped prawn or mussels. They will eat algae wafers in 1 go so if you have a plec with them be sure to feed your plec vegtables as the Jaguar will only occasionally graze on veg.

    A fairly hardy fish if obtained safely (often shipped together they will fight in the bags which means they will usually have cuts etc) with no more risk to illness than any other fish.

    South American (Amazonian) Biotope.

    Not known to have been bred in captivity.

Your comments:


Please remember that the following comments are personal experiences and may or may not apply to your setup. Use them as guide to help better understand your fish, like us all individuals will behave differently under different circumstances.








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