Filament Barb

Cyprinidae sp.

Filament Barb (Cyprinidae sp.) — Intermediate care, Semi-aggressive, under Barb & Shark. Minimum tank in the app: 53 US gal min; aim for 68–77°F and pH 6–7.8. Filament Barbs are best suited for intermediate aquarists seeking dynamic, active swimmers in a large community tank.

Filament Barb (Cyprinidae sp.) in a planted freshwater aquarium
Care levelIntermediate
TemperamentSemi-aggressive
Min tank size53 US gal min
pH range6–7.8
Temperature68–77°F
Max size5.1 in (13.0 cm)
Captive lifespan8–15 years
SchoolingYes · 6+ recommended

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

Natural distribution

Asia

  • East & Southeast Asia

Regional colours match the stocking calculator’s origin map.

Filament Barb Tank Setup

Create a spacious aquarium with a minimum volume of 200 liters and incorporate both open swimming areas and dense planting or decorations for cover. A varied substrate encourages natural foraging behaviour, while moderate to strong water flow can mimic their natural habitat. Lighting should be bright but not harsh, as it can stress the fish; consider using floating plants to diffuse the light and provide shade.

What Do Filament Barbs Eat?

Filament Barbs are omnivorous with a moderate to fast feeding speed; they compete eagerly for food, which can lead to stress among slower feeders. Offering a varied diet with both high-quality pellets and occasional live or frozen foods boosts their health and colour, while ensuring they receive adequate nutrition without excessive competition.

Filament Barb Tank Mates

Ideal companions include similarly sized, robust species that can handle some fin-nipping, such as other barbs or larger tetras. Avoid long-finned or slow-moving fish that might become targets for aggression. Within their own species, maintaining a group of six or more helps mitigate intraspecies aggression and promotes a more stable social structure.

Are Filament Barbs Good for Beginners?

We rate this as intermediate. Budget time for testing, maintenance, and watching behaviour if the water looks fine but the fish do not. Aquarists often underestimate the importance of group size, leading to increased stress and aggression when kept in smaller numbers. neglecting to provide sufficient swimming space and cover can exacerbate territorial disputes.

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.