Red Fin Black Spot Barb 5cm
The RedFin Black Spot Barb is an extremely amazing looking fish. The colors on this fish are phenomenal with an iridescent green, gold, and silver. The most beautiful thing about these barbs is the fact that they have amazing extensions that grow of their fins which has also earned them the name filament barb because of the stinking filaments flow with the movement of this fish.
Red Fin Black Spot Barb
The Red Fin Black Spot Barb is a sleek and underappreciated species of barb native to the rivers and freshwater streams of southern India. With its peaceful nature, energetic swimming habits, and eye-catching contrast, this fish makes a fantastic choice for larger planted or community aquariums. Though not as commonly seen as some other barbs, it offers a wonderful combination of activity and colour that brings a natural feel to any setup.
These barbs reach a maximum size of around 13-15 cm and are named for the deep black spot located on the tail fin, paired with vibrant red-tipped fins that intensify with maturity and optimal care. The body is typically slender and silver with a subtle golden sheen that catches light beautifully. Males tend to display deeper colours, especially during breeding periods, while females remain more subdued in tone. Their active schooling nature and torpedo-like body make them agile, fast swimmers that prefer the middle and lower parts of the tank.
Though lesser known, these barbs can be bred in captivity. Like other barbs, they are egg scatterers, and successful spawning typically occurs in a heavily planted aquarium or dedicated breeding setup. The males will chase females during courtship, and eggs are scattered over fine-leaved plants or moss. Fry are delicate and should be raised in a separate rearing tank away from adult fish for the best survival rates.
Tank Recommendations for Redfin Black Spot Barb
Being a relatively large and fast-moving species, the redfin Black Spot Barb does best in aquariums of at least 250-300 litres, especially when kept in a school of 5 or more. These fish enjoy open swimming space with scattered plants and driftwood to simulate their natural stream habitat. A strong filtration system and moderate current are appreciated, along with a soft sand or fine gravel substrate.
Maintaining high water quality is important, and they'll thrive best at 24-28°C with a slightly acidic to neutral pH of 6.5-7.0. A tight-fitting lid is also recommended, as these barbs are known to jump when startled or excited.
Suitable Tank Buddies
The redfin black spot barb is a peaceful fish with no real issues with aggression and will get along with a range of peaceful, smaller, and larger fish.
Usually Compatible
Tiger barbs, paradise fish, giant danios, severum, and similar species.
Sometimes Compatible
Fancy goldfish, Convict cichlids, Chocolate cichlids, and potentially slow or semi-aggressive fish.
Rarely Compatible
Any species that would prey on or constantly harm the redfin black spot barb, like oscars.
Feeding your Redfin Black Spot Barb
Redfin black spot barbs are very easy fish to feed. They will take a wide range of pellets, flakes, and frozen foods. Just like any fish, though, they should be fed a varied diet with a mix of different foods. The ideal diet would be a good quality micro slow sinking pellet or crushed flake, supplemented with frozen bloodworms or black worms.
| Scientific Name | Puntius Arulius |
|---|---|
| Care Level | Moderate |
| Common Names | Red Fin Black Spot Barb, Filament barb, mascara barb |
| Diet | Omnivore |
| Fish Family | Cyprinidae |
| Lifespan (years) | 10 |
| Max. Length (cm) | 15 18 |
| Min. Tank Volume (l) | 246 Litres |
| Origin | India |
| Reef Safe | With Caution |
| Sociability | Peaceful |
| Venomous | No |
| Water Conditions | 24-26° C (75-79° F), pH 5.0-7.0 |







