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Fish Freshwater Care: medium Peaceful

Jaguar Catfish

Liosomadoras oncinus
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Other names: Jaguar woodcat, Liosomadoras
Group: Other catfish · Family: Auchenipteridae · Origin: South America — Rio Negro and the northwestern Amazon basin

A nocturnal driftwood catfish reaching 20 cm, resembling a jaguar with large dark blotches on its yellowish-orange body. It may look peaceful, but it eats fish that fit in its mouth; it needs soft, acidic water.

Will it suit my tank?

Last updated October 16, 2026

Temperature
23–28°C
pH
5.5–7
Hardness
1–10 dGH
Adult size
20 cm
Minimum tank size
200 liters
Social structure
Solitary
Swimming zone
Bottom
Diet
Carnivore
Breeding
Other

Water parameters

Temperature23–28°C
pH5.5–7
General hardness (GH)1–10 dGH
Recommended range
Eats small fish Eats shrimp Suitable for planted tanks

Overview

October 16, 2026 · Suggest an edit

The jaguar catfish is a driftwood catfish that lives up to its name with large, irregular dark brown blotches on a yellowish or orangey light brown background. It comes from blackwater, soft and acidic rivers such as the Rio Negro. It spends the day in hollows of sunken wood and hunts at night. Adults reach about 20 cm; every individual's pattern is different.

Tank Setup

October 16, 2026 · Suggest an edit
  • At least 200 liters and 120 cm of length for a single adult.
  • Root hollows or pipes it can fit into completely.
  • 24–28°C, pH 5.5–7.0, soft water; dim light, dried leaves and tannin-stained water.
  • Strong filtration and regular water changes.

Diet

October 16, 2026 · Suggest an edit

Carnivorous. Offer frozen bloodworms, mysis, pieces of shrimp, worms and sinking carnivore granules. Put the food in during the evening; it rarely comes out for food during the day.

Behavior and Compatibility

October 16, 2026 · Suggest an edit

It does not attack other fish, but at night it eats any fish that fits in its mouth. It is almost never seen during the day. It lives without problems with larger, calm species.

Good companions: peaceful fish too big to fit in its mouth: large tetras, angelfish, calm American cichlids, large corydoras, plecos.

Avoid: small fish such as neons and rasboras, guppies, dwarf shrimp.

A short profile for this species

The Jaguar Catfish page has the basics, but the sections below have not been written yet. If you keep this species, write a section from your own experience; it will be published under your name after editor approval.

Tank mates

This list is calculated automatically from the species profile and grows as new species are added to the catalog. Try it in the planner for a definite answer.

Usually compatible

Should not be kept together

Hobbyist notes

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Change history and contributors
  1. Page created · October 16, 2026