• Scientific name: Liosomadoras oncinus
• Common name: Jaguar catfish
• Group: Catfishes
• Habitat: South America; Rio Ucayali (Peru), Rio Xeruiuni, Rio Negro (Brazil)
• Size: 25 cm
• Biotope: Inhabits in large rivers, streams, lakes and flooded areas.
• Social behavior: Twilight-active, gregarious fish which is suitable for the community aquarium. Can be kept with fishes over 5 cm long. Generally peaceful and shy, but territorial.
• Diet: Carnivorous; live foods of all kind, fish. Juveniles prefer tubifex. Add food after lights out.
• Breeding: Has not bred in an aquarium.
• Tank: Minimum 200 litres
• Population: 2-3 fish for 300 litres
• Decoration: Tough vegetation using Echinodorus species, roots and large stone constuctions as hideouts. It does not like bright lights, so dim lighting and floating plants are appreciated.
• Temperature: 20-28 °C
• pH: 4,8-7,2
• Hardness: 1-15NK°
• Lifespan: 8-12 years

Description: The base color of the fish is light-brown, with darker blotches on it. They get their commin name from their body pattern. The fins are also spotted. The body is short and the head is large and broad. It has a distinct yellow lateral line.

During the day they usually stay in their caves, and fiercely defend it against intruders. It is possible to house several Jaguar catfishes in the same aquarium if it is large enough. There must also be plenty of hiding spots throughout the aquarium.

Male has the urogenital papilla at the anterior edge of the anal fin, and more brightly colored. Mature males are also develop thicker dorsal and pectoral fins. Eggs are fertilized internally, similar to genus Auchenipterus, and are immediately thereafter expelled. The species has not bred in an aquarium.