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Banded Leporinus
Leporinus fasciatus
The 'Hare-snouted' giant. A massive, yellow-and-black striped herbivore reaching 30 cm. While stunningly beautiful, it is a ruthless aquatic bulldozer: it will devour all plants, rearrange the tank, and aggressively nip the fins of slower fish.
Class:Actinopteri
Order:Characiformes
Family:Anostomidae
Genus:Leporinus
Species:Leporinus fasciatus
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Water Temperature
22 - 28 °C
pH Value
6 - 7.5
Water type
Freshwater
Adult size
37 cm
Minimum tank volume
>= 300 L
Minimum group
>= 1
GH
2 - 15 dGH
KH
1 - 7 dKH
TDS
40 - 295 ppm
Conductivity
63 - 461 uS/cm
Species description
Geographical Origin and Habitat: Extremely widespread across the entire Amazon and Orinoco basins. Migrates into flooded forests during the wet season to forage heavily on submerged terrestrial plants and seeds.
Taxonomy and Morphology: A jumbo member of the Anostomidae family (reaching up to 30 cm / 12 inches). The genus name Leporinus means 'little hare', referring to their prominent, sharp buck-teeth. These teeth are powerful shears designed to crunch through thick plant stems and woody seeds. Massive, torpedo-shaped body built for speed and power.
Social Behavior: Bold, constantly hungry, and highly active. It is an incredibly powerful swimmer. Unfortunately, it has a terrible reputation: it is a notorious fin-nipper. It will brutally bite and sever the long fins or sensory barbels of slow tankmates (like Angelfish or Gouramis). Highly hierarchical and aggressive toward its own kind.
Coloration and Sexual Dimorphism: Extremely striking, reminiscent of a bumblebee or tiger. Bright canary yellow body (often flushed with orange on the snout) crossed vertically by 9 to 11 extremely thick, solid black bands. Juveniles start with fewer bands (often 5) which split like a 'Y' as the fish grows into adulthood. No obvious sexual dimorphism.
Care, breeding and tankmates
Aquarium Setup: Demands a massive footprint (MINIMUM 150-180 cm / 5-6 feet). FORGET LIVE PLANTS: they will be sheared to the gravel and eaten, including tough plants and sometimes soft plastic ones. Decorate exclusively with massive, heavy boulders, giant driftwood, and sand (they will dig). A heavy, shatter-proof lid is mandatory. A jumping 30-cm Leporinus can shatter standard glass lids and end up meters away on the floor.
Diet and Feeding: Voracious Herbivore/Omnivore. Diet MUST be primarily vegetable to prevent fatal bloat. Feed whole blanched romaine lettuce leaves, thick zucchini slices, spinach, shelled peas, and jumbo herbivore cichlid pellets. Supplement with large earthworms, whole shrimp, and jumbo bloodworms. They bite and twist violently to tear chunks off food.
Water Quality: Incredibly hardy. Adapts to almost any reasonable parameters (pH 5.5-7.5). Temp 22-28°C (72-82°F). However, because they eat massive volumes of vegetables, they produce the bioload of a large Oscar. Giant canister filters and heavy water flow (wavemakers) are required.
Compatibility and Cohabitation: Very difficult. STRICTLY FOR 'MONSTER FISH' TANKS. Never house in a standard community. They will bully and mutilate slow fish. House only with large, tough, aggressive/semi-aggressive cichlids that can defend themselves (Green Terrors, massive Geophagus, Severums, Oscars) or armored Plecos. Must be kept either as a completely SOLITARY specimen or in a massive school (8+) to disperse intraspecific aggression.
Aquarium Breeding: Unrecorded in aquaria; requires massive seasonal flood triggers.
Risks and Diseases: 1. MUTILATION: will mercilessly nip the fins off slow or peaceful tankmates. 2. Utter destruction of planted setups. 3. Smashing through tank lids due to massive jumping power. 4. Extremely long lifespan (15+ years) making them a huge long-term commitment.
Geographic Origin and Distribution
Extremely widespread across the entire Amazon and Orinoco basins. Migrates into flooded forests during the wet season to forage heavily on submerged terrestrial plants and seeds.
Origin
Amazon, Orinoco, and GuianasNorth America
Fish profile
- Temperament
- No verified data available
- Diet
- No verified data available
- Life expectancy
- No verified data available
- Adult size
- 37 cm
- Sex ratio
- No verified data available
- Feeding frequency
- No verified data available
- Bioload
- High
- Flow
- No verified data available
- Jump risk
- No verified data available
- Reproduction
- No verified data available
- Compatibility & tankmates
- No verified data available
- Tank level
- No verified data available
The catalog's scalar value is 37 cm. The FishBase SPECIES table (v25.04 snapshot) source reports a maximum adult measurement of 37 cm for this species, recorded as total length (TL). The taxonomic record consulted is Leporinus fasciatus (v25.04); male or unsexed record. These figures are not interchangeable: the first is the profile's editorial reference, whereas the second is a published maximum under a specific measurement convention; differences among sources can reflect sex, population, life stage and measuring method.
The single-adult profile is classified as high bioload. The bioload-v2 rubric deterministically assigns this class from the verified maximum length of 37 cm; it is a catalog management category, not a direct measurement of waste output.
Window to the official scientific data of the species
Data synced on: 06/15/2026
Scientific Parameters & Models
- Trophic level
- 3 ± 0.34 se
- Resilience
- Medium (1.4 - 4.4 years)
- Phylogenetic uniqueness (PD50)
- 0.5
- Bayesian Length-Weight
- a = 0.01023, b = 3.08
VulnerabilityLow to moderate vulnerability (27 / 100)
Image gallery
Licensed images linked to the species or, when marked, to the closest representative taxon.
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