Filament Barb

The Filament Barb, also known as the Blackspot Barb, is a striking and fast-swimming freshwater fish native to India and Sri Lanka. It features a silvery to golden body with a distinct black spot near the tail, while mature males develop elongated filament-like extensions on their dorsal fin along with enhanced red, yellow, and metallic hues. This active and eye-catching species is best suited for spacious aquariums.  

Filament Barb (Dawkinsia filamentosa) – Complete Care Guide Description The Filament Barb, also known as the Blackspot Barb, is a striking and fast-swimming freshwater fish native to India and Sri Lanka. It features a silvery to golden body with a distinct black spot near the tail, while mature males develop elongated filament-like extensions on their dorsal fin along with enhanced red, yellow, and metallic hues. This active and eye-catching species is best suited for spacious aquariums. Water Parameters Clean, well-oxygenated water with slight current is ideal: Temperature: 22–27°C (72–81°F) pH: 6.5–7.5 Hardness: 5–15 dGH Tank Size: Minimum 150–200 liters (40–55 gallons) Water Flow: Moderate to strong Water Changes: 25–30% weekly Care & Maintenance Filament Barbs are hardy but require space and good care: Keep in groups of at least 6–8 to reduce aggression. Provide a large aquarium with open swimming areas. Add plants, rocks, and driftwood along the edges for structure. Maintain excellent water quality and strong filtration. Feed a varied omnivorous diet: flakes, pellets, vegetables, and live/frozen foods (daphnia, bloodworms). Ensure good oxygenation due to their active nature. Behaviour & Temperament Active and semi-aggressive species. Fast swimmers that enjoy open space. Males may display dominance and chasing behavior. Can nip fins if kept in small groups. More peaceful when kept in proper school sizes. Compatibility Suitable for semi-active to semi-aggressive community aquariums. Best with similarly sized, active fish. Avoid slow or delicate species. Suitable Tank Mates Larger tetras Rainbowfish Other barbs Loaches Medium-sized peaceful cichlids Tank Mates to Avoid Long-finned fish (bettas, angelfish, gouramis) Very slow-moving species Small delicate fish Highly aggressive or territorial fish Pro Tips Keep in larger groups to reduce aggression. Provide ample swimming space—they are very active. Use strong filtration and aeration for optimal health. Feed a balanced diet including plant matter. Maintain stable water conditions. Use a secure lid—they are powerful swimmers and may jump. Summary The Filament Barb is a vibrant, active, and hardy fish that thrives in larger aquariums with ample swimming space. With proper care, group size, and compatible tank mates, it becomes a dynamic and visually impressive addition to semi-active community setups.