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Species profile

L003 Baryancistrus Plecostomus

Baryancistrus sp. (L003)

Common names: L003 Baryancistrus Plecostomus, L003

Undescribed speciesPlecostomus

Countries of origin

  • See all stock from Brazil

Good fit for your tank?

Good fit for

  • An experienced keeper of unnamed Baryancistrus forms
  • A mature warm aquarium with strong flow and filtration
  • An aquarist committed to accurate L-number records

Think carefully if

  • The seller cannot support the L003 identification
  • The aquarium is newly established
  • Food and cave competition cannot be controlled

L003 Baryancistrus Plecostomus is a South American loricariid represented by L003. It requires stable oxygen-rich water, suitable caves, and deliberate species-appropriate feeding.

Appearance and Identification

A medium to large Baryancistrus with a dark body patterned by pale spots or mottling. Appearance can overlap with related unnamed forms, so the L003 designation and collection history should be preserved.

Use the L-number identification L003 together with the current assignment Baryancistrus sp. (L003). Do not merge it with visually similar forms without matching collection locality and diagnostic features. The L-number remains the principal stable identifier because the form is undescribed or not conclusively assigned.

Mature males tend to develop broader heads and stronger cheek and pectoral odontodes. Females become fuller, while juveniles are difficult to sex.

Tank Requirements

Suggested filter
About 1,000–1,250 litres an hour
Suggested heater
About 250–375 W for this tank
Minimum tank volume
250 litres
Minimum tank length
120 cm
Minimum group size
1
Recommended group size
3
Activity level
Moderate
Flow preference
High
Planting preference
Lightly planted
Hiding places
Yes
Lid recommended
Yes
Jumping risk
Low

Provide warm, highly oxygenated water, strong filtration, broad grazing surfaces and multiple secure caves. Monitor all new fish for active feeding and stable body condition.

Behaviour and Tankmates

Usually reserved but territorial around food and shelter. Adults may become forceful with other plecos in limited floor space.

Can be kept singly. A pair or group requires several appropriately sized caves and enough floor area for every adult to feed without being trapped.

Mature males commonly defend caves and favoured feeding areas from similarly shaped loricariids.

Peaceful midwater fish are appropriate. Other loricariids need separate caves, feeding stations and clear visual barriers.

Check tankmates for this species

Water Parameters

Temperature
26–31 °C
pH
5.5–7.5
GH
1–15
KH
0–6
TDS
30–240
Stability importance
Critical

Maintain stable clean water with strong oxygenation. Warm water, protein-rich food, wood waste, and crowded hardscape can rapidly reduce oxygen and degrade water quality.

Parameter caveat
Acclimate slowly to temperature and conductivity changes. Keep ammonia and nitrite at zero, control nitrate, and inspect caves and rockwork for trapped waste.

Feeding

Diet types
Aufwuchs Grazer, Herbivore, Omnivore
Feeding frequency
Daily
Preferred foods
  • Natural aufwuchs and biofilmMaintain mature rocks and wood for continuous supplementary grazing.
  • Complete herbivore or algae waferUse a high-quality sinking staple with fibre.
  • Blanched leafy greens or courgetteOffer occasionally and remove leftovers.
  • Frozen daphnia or insect larvaeUse small portions as supplementary protein.

Offer vegetable and algae-rich sinking foods, soft vegetables and biofilm, with modest invertebrate protein. It should not depend on natural algae alone.

Feed after lights dim and distribute food near every occupied shelter. Confirm that subordinate fish eat and remove rich leftovers before they affect water quality.

Breeding

Breeding type
Cave Spawner, Egg Layer
Breeding difficulty
Difficult
Breeding temperature
28.5 °C
Breeding pH
6.5
Brood or egg count
Usually several dozen adhesive eggs; dependable species-specific fecundity data are unavailable.
Incubation
7 days
Parental care
Paternal care
Baby foods
  • Mature biofilmProvides continuous grazing after fry leave the cave.
  • Fine powdered sinking foodFeed tiny portions close to shelter several times daily.
  • Newly hatched brine shrimpUse as supplementary protein once fry can take moving prey.

Breeding information for L003 is limited. A male-guarded cave is expected for Baryancistrus, but repeatable captive methods are not well documented.

Habitat and Origin

Geographic origin
Amazon Basin, Brazil, South America
Natural habitat
Fast-Flowing Stream, Freshwater River, Rocky Shoreline
Aquarium contexts
Freshwater Aquarium, High-Flow Aquarium, Large Freshwater Aquarium, Species-Only Aquarium
Audience level
Advanced

Classification

Profile type
Undescribed species
Genus
Baryancistrus
Family
Loricariidae
Species group
Fish, Plecostomus

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