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Puntius filamentosus, commonly known as the Black Spot Barb or Filament Barb, is a freshwater fish belonging to the family Cyprinidae. It is characterized by its elongated, moderately compressed body, vibrant coloration, and a distinct black spot on its caudal peduncle. Males develop elongated dorsal fin rays and more intense coloration, especially during breeding. This species is known for its peaceful temperament and schooling behavior, making it a popular choice for aquarists.
Physical Characteristics
- Body shape
- compressed
- Coloration
- Males exhibit a vibrant reddish-orange body with iridescent scales, especially during breeding. Females are typically duller, with a silvery-yellow to olive-brown body. Both sexes have a prominent black spot on the caudal peduncle. The dorsal fin often has a black margin, and the caudal fin can be reddish.
- Scale type
- cycloid
- Mouth position
- terminal
- Distinctive features
- Prominent black spot on the caudal peduncle, Elongated dorsal fin rays in mature males, Two pairs of small barbels (often difficult to see without close inspection), Forked caudal fin
- Dorsal fin
- Dorsal fin with 3-4 unbranched and 8 branched rays. In mature males, the anterior branched rays are significantly elongated, forming filaments.
- Tail fin
- Deeply forked caudal fin, often reddish.
- Pectoral fin
- Pectoral fins are relatively small and translucent.
- Distinctive fins
- Pelvic fins are also small. Anal fin has 3 unbranched and 5 branched rays. The elongated dorsal fin rays in males are a key distinguishing feature.
Identification Tips
Black Spot
Look for a distinct, round black spot located on the caudal peduncle, just before the tail fin. This is a primary identifier.
Dorsal Fin Filaments (Males)
Observe the dorsal fin. Mature males will have noticeably elongated, filamentous rays extending from the dorsal fin, which are absent or much shorter in females and juveniles.
Coloration
Males display vibrant reddish-orange hues, especially when breeding, while females are more subdued in color (silvery-yellow to olive-brown).
Body Shape
Note the moderately compressed, elongated body shape typical of barbs.
Habitat
- Water type
- freshwater
- Depth
- Typically found in shallow to moderately deep waters, usually less than 2 meters.
- Environment
- Inhabits clear, well-oxygenated rivers, streams, canals, and floodplains with sandy or gravelly substrates. Prefers areas with moderate to strong currents and abundant aquatic vegetation or submerged roots for shelter.
- Geographic range
- Native to the Western Ghats of India, specifically found in the states of Kerala, Karnataka, and Tamil Nadu. Also reported from Sri Lanka.
Aquarium Information
- Care level: beginner
- Temperament: peaceful
- Diet: omnivore
- Minimum tank size: 75 liters (20 gallons)
- Temperature: 20-26°C (68-79°F)
- pH level: 6.0-7.0
- Hardness: 5-12 dGH
- Compatibility: Excellent for community tanks with other peaceful, similarly sized fish. Avoid keeping with very small, shy species or fin-nipping fish.
- Special requirements: Requires a well-planted aquarium with open swimming spaces. Benefits from a strong current and good filtration. Best kept in groups of 6 or more to encourage natural schooling behavior and reduce stress.
Wild Information
- Conservation status: least concern
- Seasonality: Breeds during the monsoon season (June-September) in its natural habitat, coinciding with increased water levels and food availability.
- Market price: Low to medium (aquarium trade)
- Commercial importance: medium
- Taste: Mild, slightly earthy
- Texture: Flaky, tender
- Cooking methods: Frying, Curry, Grilling
- Nutritional value: Good source of protein and omega-3 fatty acids.
Key Facts
Filamentous Finsinteresting
The species name 'filamentosus' refers to the elongated, filamentous dorsal fin rays that develop in mature males, a striking feature during breeding.
Color Changebehavior
Male Black Spot Barbs exhibit a remarkable intensification of their reddish coloration during spawning periods, making them particularly attractive.
Schooling Behaviorbehavior
These barbs are highly social and thrive in groups, displaying complex schooling behaviors that are fascinating to observe in both wild and aquarium settings.
Habitat Indicatorinteresting
Their preference for clear, well-oxygenated waters makes them an indicator species for healthy aquatic ecosystems in their native range.
Safety Information
Safe- Safety level: safe
- Venomous: No
- Edibility: edible
- Handling notes: No specific handling precautions are required beyond standard fish handling practices to minimize stress and injury to the fish. They are not venomous and do not possess sharp spines that pose a significant threat.
Similar Species
Cherry Barb
Puntius titteya
Cherry Barbs are smaller, typically reaching 5 cm, and males are a uniform deep red without the prominent caudal peduncle spot. They also lack the elongated dorsal fin filaments of P. filamentosus.
Denison Barb
Sahyadria denisonii
Denison Barbs are larger, more torpedo-shaped, and possess a distinctive red stripe along the lateral line and a black stripe below it. They do not have the caudal peduncle spot or filamentous dorsal fin rays.
Rosy Barb
Pethia conchonius
Rosy Barbs are generally deeper-bodied and have a more rounded profile. While males can be reddish, they typically have a less distinct black spot (if present) and lack the elongated dorsal fin filaments.
Scientific Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Actinopterygii
- Order
- Cypriniformes
- Family
- Cyprinidae
- Genus
- Puntius
- Species
- Puntius filamentosus
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