Flagtail Catfish

Siluriformes sp.

Flagtail Catfish (Siluriformes sp.) — Easy care, Peaceful, under Catfish & Cory. Minimum tank in the app: 40 US gal min; aim for 77–82°F and pH 6–7.8. The Flagtail Catfish is well-suited for both novice and experienced aquarists, known for its tranquil nature and adaptability.

Flagtail Catfish (Siluriformes sp.) in a planted freshwater aquarium
Care levelEasy
TemperamentPeaceful
Min tank size40 US gal min
pH range6–7.8
Temperature77–82°F
Max size4.9 in (12.5 cm)
Captive lifespan8–16 years
SchoolingNo

Captive lifespan reflects typical experience in a home aquarium, not maximum recorded age; genetics, sourcing, and care vary.

Natural distribution

Mostly South America / Africa

  • South America
  • Africa

Regional colours match the stocking calculator’s origin map.

Flagtail Catfish Tank Setup

Aim for a spacious layout that combines open swimming areas with plenty of hiding spots using driftwood and caves, fostering a sense of security. A soft substrate is ideal to protect their delicate barbels, while subdued lighting can help reduce stress and encourage natural behaviors.

What Do Flagtail Catfishs Eat?

Feeding is typically slow-paced, as Flagtail Catfish prefer to graze on sinking foods. Competition for food is minimal, allowing for a relaxed feeding environment.

Flagtail Catfish Tank Mates

This species harmonizes well with other peaceful bottom-dwellers and mid-water swimmers of similar size, such as some tetras and rasboras. Avoid aggressive or overly active species that may outcompete for resources or disturb their habitat. Intraspecies interactions are generally non-confrontational, as they do not form shoals but can coexist with multiple individuals in larger setups.

Are Flagtail Catfishs Good for Beginners?

In App-aquatic we file this under easy care. That still means a cycled tank, realistic stocking, and parameters that do not swing every weekend. Aquarists often underestimate the need for space and hiding spots, leading to stress and decreased activity levels. neglecting water quality and parameters can cause health issues, as this species is sensitive to fluctuations in pH and temperature.

Building a community? Run the full list through the stocking calculator before you add anything else.

Log tests and reminders in App-aquatic—free, same data you see here.