Filament Barb
Dawkinsia filamentosa
Also known as: Blackspot Barb
A large, lively Indian barb whose males grow ornate trailing dorsal fins.

About
The Blackspot Barb (Dawkinsia filamentosa) is a solidly built cyprinid from southern India, particularly associated with Kerala, where it turns up in a wide range of habitats including clear hill streams, lowland rivers, reservoirs, and even brackish estuaries. Adults are most easily identified by the dark blotch on the caudal peduncle and, in males especially, by the elongated filament-like extensions that develop on the dorsal fin rays. A feature that gives rise to its other common name, the Filament Barb. This is one of the larger barbs regularly seen in the hobby, and its size and energy level mean it needs some space and appropriately robust tankmates. Peaceful fish that are easily intimidated or small enough to be viewed as snacks are poor choices. It does best in a school of eight to ten or more; keeping good numbers keeps individuals calmer, distributes any squabbling among the males, and produces the kind of coordinated group movement that makes the species worth keeping in the first place. Loaches and other active schooling cyprinids from a similar background tend to make the most natural-looking companions. Breeding follows typical egg-scattering cyprinid lines, with no parental care. Adults will eat their own eggs if given the chance, so separating them promptly is essential for any serious breeding effort. This is an intermediate-level fish best suited to keepers with some experience managing active, sizeable schooling species.
Similar species
Other fish you might consider
Good tank mates
Species that tend to coexist peacefully with Filament Barb
From the same region
Share the same natural habitat. Great for a biotope-themed tank
Frequently asked questions
- How big does the Filament Barb get?
- The Filament Barb reaches about 4–7" as an adult.
- What size tank does the Filament Barb need?
- A minimum of 43 gallons is recommended for the Filament Barb, with more room needed for a proper group.
- What water parameters does the Filament Barb need?
- The Filament Barb does best with a temperature of 68–79°F, a pH of 6–7.5, hardness around 2–15 dGH.
- Is the Filament Barb aggressive?
- The Filament Barb is semi-aggressive. It can work in a community with careful tankmate choices and enough space.
- What does the Filament Barb eat?
- The Filament Barb is an omnivore. It does well on a varied diet of quality flake or pellet plus occasional frozen or live foods.
- How long does the Filament Barb live?
- With good care, the Filament Barb typically lives 2-8 years.