Hujeta Gar / Freshwater Barracuda
Ctenolucius hujeta
The Hujeta Pike Characin is a torpedo-shaped surface predator from South America. While peaceful alongside large tankmates, it requires a tightly covered, long aquarium to stalk its prey safely.
Temperatura da água
22 - 28 °C
Valor de pH
6.5 - 7.5
Tipo de água
Água doce
Nível do tanque
Superfície
Tamanho adulto
25 cm
Volume mínimo do tanque
>= 300 L
Grupo mínimo
>= 1
GH
4 - 15 dGH
KH
2 - 7 dKH
TDS
80 - 295 ppm
Condutividade
125 - 461 uS/cm
Descrição da espécie
Geographical Origin and Habitat: South America (Magdalena River basin and coastal rivers of Venezuela). Hunts by waiting motionless near the surface, sheltered by floating vegetation in calm lagoons and oxbow lakes.
Taxonomy and Morphology: Hujeta Pike Characin / Gar Characin (Ctenolucius hujeta). It is not a pike or a gar, but a predatory Characin. Elongated and extremely tapered shape; extended upper mouth full of needle-like teeth.
Social Behavior: Although a predator, it is actually a shy, calm and gregarious fish. Should be kept in small groups (4-6 specimens); if kept singly it becomes very nervous and darts terrified against the glass.
Coloration and Sexual Dimorphism: Silvery or iridescent golden livery with conspicuous scales. Has a conspicuous black spot at the base of the caudal fin. Females grow much larger and are more massive in the abdomen, males develop longer and jagged anal fins.
Cuidado, criação e companheiros de tanque
Aquarium Setup: Needs very long tanks (minimum 150 cm / 60 inches) tightly covered to prevent disastrous leaps. Keep the upper area clear for swimming, with large clumps of floating plants on the sides for lying in wait.
Diet and Feeding: Strictly piscivorous/carnivorous. Devours live fish, but must absolutely be weaned (with patience) to dead fish, shelled shrimp, mussels and squid strips administered via tweezers on the surface. Ignores sinking food or vegetable pellets.
Water Quality: Requires strong oxygenation and water free of nitrogenous compounds, as large fish fed meat pollute a lot. Oversized biological filtration, but gentle outlet flow so as not to disturb them on the surface.
Compatibility and Cohabitation: Peaceful with those who do not fit in its mouth (fish over 6 cm / 2.5 inches). Excellent with bottom Loricariids, Geophagus, large Tetras, and calm Cichlids. Forbidden with pufferfish, fin-nippers (Tiger Barbs) or violent cichlids.
Aquarium Breeding: Rare. Well-matched pairs lay large quantities (up to 1000) of non-adhesive eggs, scattering them in open waters or among floating vegetation, and then lose interest or prey on them.
Risks and Diseases: The elongated snout is very delicate: collisions against the glass due to panic cause jaw fractures that are almost always fatal or fungal infections on the snout ("beak fungus").
Origem e distribuição geográfica
South America (Magdalena River basin and coastal rivers of Venezuela). Hunts by waiting motionless near the surface, sheltered by floating vegetation in calm lagoons and oxbow lakes.
Origem
Extra-Amazônica América do Sul
Perfil de peixe
- Temperamento
- Semi-aggressive
- Despite being a voracious predator, the Hujeta Gar is generally peaceful and easily intimidated by boisterous tank mates. It poses a threat only to fish small enough to be considered prey. When housed with appropriately sized companions, it is a calm and fascinating surface dweller.
- Dieta
- Omnivore
- It is a strict carnivore, naturally preying on small fish and insects at the water's surface. In captivity, it can be trained to accept meaty frozen or prepared foods such as krill, silversides, and floating carnivore pellets. Live feeder fish can be offered occasionally but should be quarantined first to prevent disease introduction.
- Expectativa de vida
- 5-8 years
- Tamanho adulto
- 25 cm
- Proporção sexual
- Group
- Females generally grow noticeably larger and have a more robust, deeper body than males, especially when carrying eggs. Males tend to be slimmer and slightly more colorful, particularly around the anal fin. While they can be kept in small groups, a specific sex ratio is not strictly required unless attempting to breed.
- Frequência de alimentação
- Twice daily
- Juveniles require frequent feeding, about two to three times a day, to support their rapid growth rate. Adults have a slower metabolism and generally only need to be fed once a day or every other day. Care should be taken not to overfeed, as uneaten meaty foods quickly degrade water quality.
- Carga biológica
- Medium to High
- The Hujeta Gar produces a moderately high bioload due to its carnivorous diet and predatory nature. As it grows and consumes larger meaty foods, it generates significant waste that requires robust filtration. Frequent, large water changes are necessary to keep nitrate levels manageable and ensure optimal health.
- Fluxo
- Stagnant
- The Hujeta Gar prefers areas of calm or slow-moving water, similar to the stagnant pools and sluggish rivers it inhabits in the wild. While some filtration current is necessary, strong powerheads or turbulent surface flow should be avoided. A gentle return flow provides adequate oxygenation without exhausting the fish.
- Risco de salto
- Yes
- Because it is a surface-dwelling predator adapted to lunging at prey, this fish poses an extremely high jump risk. They are easily startled by sudden movements outside the tank and may propel themselves out of the water. A tight-fitting, heavy lid with no gaps is absolutely mandatory to prevent fatalities.
- Reprodução
- Oviparous
- Breeding the Hujeta Gar in home aquariums is rare but not impossible for dedicated hobbyists. They are egg scatterers that prefer to spawn among dense floating vegetation. The fry are highly cannibalistic and require immediate separation and grading by size, along with a constant supply of live micro-foods.
- Compatibilidade e companheiros de tanque
- With caution
- This predatory fish will readily consume any tank mate small enough to fit into its mouth. It should only be kept with similarly sized or larger, peaceful to semi-aggressive fish that are too big to be eaten. Avoid overly aggressive or fin-nipping species that might harass the somewhat delicate Hujeta Gar.
- Nível do tanque
- Top
- This species is almost exclusively a top-dwelling fish, spending the vast majority of its time hovering just below the water surface. It stalks its prey from this vantage point, using its upward-facing mouth to snatch food. Floating plants can help provide cover and make them feel more secure at the surface.
Modelos e parâmetros científicos
FishBase
Acesso aos dados científicos oficiais da espécie
FishBase v25.04Dados sincronizados em: 15/06/2026
- Nível trófico
- 4,2 ± 0,73 se
- Resiliência
- Média (1,4 - 4,4 anos)
- Unicidade filogenética (PD50)
- 0.7578
- Relação bayesiana comprimento-peso
- a = 0.00447, b = 3.1
- VulnerabilidadeVulnerabilidade baixa (22 / 100)
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