Red Tail Barracuda
Acestrorhynchus falcirostris
Red Tail Barracuda (Acestrorhynchus falcirostris) — Varies care, Peaceful, under Other. Minimum tank in the app: 100 US gal min; aim for 72–82°F and pH 6.5–7.5. The Red Tail Barracuda is an intriguing choice for aquarists seeking a semi-aggressive, mid-level swimmer that thrives in larger environments.

Captive lifespan reflects typical experience in a home aquarium, not maximum recorded age; genetics, sourcing, and care vary.
Natural distribution
South America
- South America
Regional colours match the stocking calculator’s origin map.
Red Tail Barracuda Tank Setup
A spacious tank of at least 380 liters is crucial, emphasizing open swimming areas complemented by strategically placed decor for shelter. Strong filtration and moderate water flow mimic its natural habitat, while a neutral substrate supports its feeding behaviors. Lighting should be moderate, allowing the fish to feel secure without excessive shadows or bright spots.
What Do Red Tail Barracudas Eat?
Being an omnivore, it has a varied diet, but feeding speed can vary; it may compete vigorously for food. Offering a mix of high-quality pellets and occasional protein-rich treats can enhance coloration and vitality.
Red Tail Barracuda Tank Mates
Ideal companions include similarly sized, fast-moving species that can hold their own, avoiding overly aggressive or slow tank mates. Caution is warranted with species like long-finned fish, which may provoke aggression. Intraspecies, they generally tolerate one another unless confined, making solitary housing often preferable.
Are Red Tail Barracudas Good for Beginners?
Care demand varies with setup and individual fish; use the numbers above as your baseline. Aquarists often underestimate the space and filtration needs of the Red Tail Barracuda, leading to water quality issues and increased aggression. Neglecting to provide adequate swimming room and decor can exacerbate territorial behavior and stress levels, compromising fish health.
Building a community? Run the full list through the stocking calculator before you add anything else.
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