Home / Fishes / Catfish / Leiarius longibarbis
No federal permit to keepLeiarius longibarbis
Leiarius longibarbis
Fishes › Catfish (Siluriformes) › Pimelodidae (Long-whiskered catfish)
Leiarius longibarbis, commonly as Marbled Pim, is a species of demersal catfish of the family Pimelodidae that is native to Guyana and Brazil. It inhabits Rio Orinoco in Colombia and Venezuela, Rio Essequibo in Guyana, and the Amazon basin in…
Intro from Wikipedia (CC BY-SA 4.0)
Care at a glance
Species-specific aquarium care
- Water: Freshwater.
- Layout: Lives on or near the bottom: floor space and hiding places matter more than height.
- Availability: Rarely or never seen in the aquarium trade; expect to source it from specialists or not at all.
Calculated from this species' own FishBase record: tank size from its typical adult length and swimming zone, water values from its recorded ranges. The group guide below fills in general care.
Care guide
Species care notes
- Tank: a base of at least 118 × 35 in (roughly 856 US gallons); space needed is rated “very large tank”.
- Water: a fairly wide range, from slightly acidic to slightly alkaline, 70–79 °F, pH 5.8–7.4, 5–20 dGH.
- Behaviour: temperament peaceful.
- Difficulty: Moderate (Seriously Fish rating).
Short excerpts from the species profile:
- Setup: “Strictly speaking, decor isn't necessary for a tank containing an adult, provided the lighting is fairly dim.”
- Diet: “Piscivorous by nature, but usually adapts well to dead foods in captivity.”
- Tankmates: “Whilst it won't hesitate to gobble any smaller fish, it's actually quite peaceful and can be kept alongside other similarly-sized species in suitable surroundings.”
From the Seriously Fish profile for this species, which has the full habitat, maintenance, diet, behaviour and breeding write-up 167
Long-whiskered catfish
Applies to most species in this group. Habitat: South American pimelodids occupy river channels and tributaries, with redtails and shovelnoses also using flooded forests. [fg178-pictus, fg178-redtail, fg178-sorubim]. Individual species can differ, so compare with the species numbers above and the linked sources.
Housing & setup
- For P. pictus, use at least 120 × 45 × 45 cm (about 243 L), with open swimming space.
- Adult redtails and P. fasciatum require facility-scale housing: approximately 360 × 240 × 120 cm (10,368 L) is explicitly only a minimum in the reference.
- Provide dim lighting and appropriately sized shelters; use fine sand for pictus.
- For giant species, secure heavy furnishings and avoid swallowable gravel; bare bottoms or large smooth pebbles are alternatives.
- Use efficient biological filtration, regular partial water changes and, for giants, equipment protected in an external sump.
Climate & lighting
| Water | 71.6–77°F |
Diet
- Pictus: sinking prepared foods and frozen bloodworms.
- Earthworms, sized for the fish.
- Giant predators: prawns and mussels.
- Giant predators: white-fish portions; vary foods and reduce feeding frequency as adults mature.
Social life
- Pictus are shoaling fish, preferably six or more in adequate space; adult redtails and shovelnoses can be territorial towards other large pimelodids. Companions must be too large to swallow.
Health watch
- Barbel erosion with deteriorating water quality.
- White spot and poor condition in newly imported pictus.
- Obesity and fatty organ damage from overfeeding or inappropriate mammal meat.
Understanding the animal
In the wild
In the wild
From this species’ own FishBase record (habitat, bottom type, water and breeding data), not its family. Good care copies these conditions.1
| Where it lives | Lives in freshwater. Stays near the bottom. |
| Water it lives in | Freshwater. |
| Climate | Tropical climate. |
Native climate (measured)
Native climate (measured)
| Warm-season highs | about 92°F (up to 95°F in the hottest sampled areas) |
| Cool-season lows | about 70°F (down to 60°F in the coldest sampled areas) |
| Average temperature | 77–82°F across sampled records |
| Relative humidity | 74–77% on average (driest month about 64%) |
| Rainfall | about 1615 mm a year |
Measured at 6 wild occurrence records sampled against WorldClim 2.1 climate data (1970–2000 averages). Air conditions in the range are ecological context, not enclosure settings: microhabitats such as burrows, leaf litter or basking rocks can be cooler, warmer or more humid.
From the sources
From the sources
Quoted from the matching sections of reputable sources for this exact species. Specialist databases are used first; Wikipedia (community-edited, CC BY-SA 4.0) only fills gaps. Other sources are short credited quotes.
| Where it lives | Home ranges Population dynamics Growth parameters Max. ages / sizes Length-weight rel. Length-frequencies Mass conversion Recruitment Abundance Life cycle Reproduction Maturity Maturity/Gills rel. — FishBase |
Data and studies
The numbers
The numbers
Each bar is what one source reports. Where several sources weigh in, the dashed gold band marks their average.
Water temperature
Range the species tolerates; aim for the middle.
pH
Water hardness
Adult length
Minimum tank footprint
Seriously Fish recommends a tank base of at least 118 × 35 in (about 856 US gallons).
Sources for this sheet
- Seriously Fish species profiles Experienced keeper or breederLong-running aquarium reference written and peer-checked by experienced fishkeepers and ichthyologists; each profile covers habitat, tank size, water, diet, behaviour and breeding.
- Seriously Fish: Pimelodus pictus Experienced keeper or breederAdded in the 2026 source-checked care-guide review.
- Seriously Fish: Phractocephalus hemioliopterus Experienced keeper or breederAdded in the 2026 source-checked care-guide review.
- Seriously Fish: Pseudoplatystoma fasciatum Experienced keeper or breederAdded in the 2026 source-checked care-guide review.
- FishBase (Froese & Pauly, eds.), version 24.07 Peer-reviewed researchThe global scientific database on fishes, maintained by a consortium of research institutions; every value is referenced.
- Wikipedia (species article) Community referenceFree encyclopedia; useful overviews with their own citations. Intro text is quoted under CC BY-SA 4.0.
More long-whiskered catfish
Barred sorubim
Pseudoplatystoma fasciatum
Aquarium hobby
Bolt Catfish
Aguarunichthys torosus
Aquarium hobby
Duckbill catfish
Sorubim lima
Aquarium hobby
Kumakuma
Brachyplatystoma filamentosum
Aquarium hobby
Laulao catfish
Brachyplatystoma vaillantii
Aquarium hobby
Peru Piraíba
Brachyplatystoma capapretum
Aquarium hobby