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Fish Freshwater Care: medium Semi-aggressive

Three Beacon Pleco (L091)

Leporacanthicus triactis
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Other names: L091, Three beacon plec, Leporacanthicus triactis
Group: Plecos and suckermouth catfish · Family: Loricariidae · Origin: South America — upper Orinoco basin (Colombia, Venezuela)

A carnivorous Leporacanthicus reaching 25 cm, named "three beacons" for its dark body and the orange-yellow patches on its dorsal and tail fins. It is territorial and needs a spacious aquarium with soft water.

Will it suit my tank?

Last updated October 16, 2026

Temperature
25–29°C
pH
5.5–7
Hardness
1–8 dGH
Adult size
28 cm
Minimum tank size
300 liters
Social structure
Solitary
Swimming zone
Bottom
Diet
Carnivore
Breeding
Substrate spawner

Water parameters

Temperature25–29°C
pH5.5–7
General hardness (GH)1–8 dGH
Recommended range
Eats shrimp Eats snails Suitable for planted tanks

Overview

October 16, 2026 · Suggest an edit

The three beacon pleco is recognized by its dark body and the bright orange-yellow patches on its unpaired fins; the name "three beacons" comes from these patches, and the colors are retained in adults as well. It is known from the upper Orinoco, in Colombia and Venezuela.

Adults reach 24–25 cm standard length and 28–30 cm including the tail. Like other members of its genus, it is a carnivorous species that hunts snails and crustaceans with its long upper teeth.

Tank Setup

October 16, 2026 · Suggest an edit
  • At least 300 liters and a 120 × 45 cm footprint for one adult.
  • Soft, slightly acidic water; a strong filter and flow.
  • Large caves that fit its body and rock piles; 26–28°C.

Diet

October 16, 2026 · Suggest an edit

Carnivorous. Make pieces of mussel, shrimp and fish, krill, bloodworms and protein-rich sinking tablets the staple. It loves snails; it accepts small amounts of vegetables.

Behavior and Compatibility

October 16, 2026 · Suggest an edit

Nocturnal and territorial. It can be aggressive toward its own kind and other plecos; it defends its cave fiercely. It eats shrimp and snails.

Good companions: Medium and large fish that like soft water: large tetras, Geophagus species, medium-sized cichlids.

Avoid: Shrimp, snails, other plecos (in limited space), small and slow bottom dwellers.

A short profile for this species

The Three Beacon Pleco (L091) 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