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Laubuka laubuca, commonly known as the Glass Barb, is a small, schooling freshwater fish belonging to the family Cyprinidae. It is characterized by its translucent body, allowing internal organs to be visible, and a distinctive hatchet-like body shape with an upward-pointing mouth. This species is known for its active swimming behavior and preference for clear, flowing waters.
Physical Characteristics
- Body shape
- compressed
- Coloration
- Body largely translucent, appearing silvery-white to yellowish, with a prominent, often iridescent, lateral stripe running from the operculum to the caudal peduncle. Fins are hyaline (clear) to slightly yellowish. Some individuals may exhibit a faint reddish or orange tint, especially during breeding.
- Scale type
- cycloid
- Mouth position
- superior
- Distinctive features
- Highly compressed, hatchet-shaped body, Translucent body allowing visibility of internal organs, Superior (upward-pointing) mouth, Long, pointed pectoral fins
- Dorsal fin
- Small, located posteriorly, with 2 unbranched and 7-8 branched rays.
- Tail fin
- Deeply forked, with pointed lobes.
- Pectoral fin
- Long and pointed, extending significantly, giving a 'winged' appearance.
- Distinctive fins
- Pelvic fins are small and located abdominally. Anal fin is long, originating anterior to the dorsal fin, with 3 unbranched and 15-19 branched rays.
Identification Tips
Body Shape
Look for the distinctively compressed, hatchet-like body profile, which is much deeper than it is wide.
Translucency
The body is largely transparent, allowing a view of the spine and internal organs, especially in younger specimens.
Mouth Position
The mouth is distinctly upturned (superior), adapted for feeding on surface insects.
Pectoral Fins
Observe the long, pointed pectoral fins that extend outwards, contributing to its 'winged' appearance.
Lateral Stripe
A prominent, often iridescent, silvery or golden lateral stripe runs along the flank.
Habitat
- Water type
- freshwater
- Depth
- Typically found in shallow to moderate depths, often near the surface.
- Environment
- Inhabits clear, flowing streams, rivers, canals, and sometimes ponds and ditches. Prefers areas with submerged vegetation and moderate current. Often found in the mid-water to upper water column.
- Geographic range
- Widely distributed across South and Southeast Asia, including India, Bangladesh, Nepal, Sri Lanka, Myanmar, Thailand, and parts of Malaysia and Indonesia.
Aquarium Information
- Care level: beginner
- Temperament: peaceful
- Diet: omnivore
- Minimum tank size: 20 gallons (75 liters)
- Temperature: 20-26°C (68-79°F)
- pH level: 6.0-7.5
- Hardness: 5-15 dGH
- Compatibility: Excellent for community tanks with other peaceful, similarly sized fish. Best kept in schools of 6 or more individuals.
- Special requirements: Requires a well-filtered aquarium with good water flow. Benefits from a planted tank with open swimming areas. A tight-fitting lid is essential as they are known jumpers.
Wild Information
- Conservation status: least concern
- Seasonality: Breeds during the monsoon season in its native range, typically from June to September.
- Market price: Low
- Commercial importance: low
- Taste: Not typically consumed due to small size.
- Texture: Not typically consumed due to small size.
- Nutritional value: Not typically consumed due to small size.
Key Facts
Transparent Bodyinteresting
The Glass Barb's translucent body allows its internal organs and skeletal structure to be visible, a unique adaptation.
Surface Feederbehavior
Its superior mouth is perfectly adapted for feeding on insects and other small invertebrates found at the water's surface.
Schooling Fishbehavior
Laubuka laubuca is a highly social species that thrives in large schools, providing safety in numbers and enhancing its natural behavior.
Leaping Abilitybehavior
These fish are known for their ability to leap out of the water, especially when startled or during feeding, hence the 'Flying Barb' moniker.
Wide Distributionamazing
Despite its small size, the Glass Barb has one of the widest distributions among small cyprinids in South and Southeast Asia.
Safety Information
Safe- Safety level: safe
- Venomous: No
- Edibility: not recommended
- Handling notes: No specific handling precautions are required. They are small, delicate fish and should be handled gently to avoid injury.
Similar Species
Flying Barb
Chela cachius
While also having a compressed body and superior mouth, Chela cachius generally has a more elongated body shape and less pronounced translucency. The lateral line is complete in Chela cachius, whereas it is incomplete or absent in Laubuka laubuca.
Malabar Hatchetfish
Laubuka varuna
Laubuka varuna is a recently described species from the Western Ghats of India. It can be distinguished by subtle differences in fin ray counts, body proportions, and genetic markers. Visually, L. varuna may have a more pronounced dark lateral stripe and slightly different body depth to length ratio.
Other Laubuka species
Various Laubuka spp.
The genus Laubuka contains several species, many of which are morphologically similar. Differentiation often requires careful examination of meristic counts (fin rays, scales), morphometric measurements, and sometimes genetic analysis. L. laubuca is generally distinguished by its specific combination of body depth, fin ray counts, and coloration.
Scientific Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Actinopterygii
- Order
- Cypriniformes
- Family
- Cyprinidae
- Genus
- Laubuka
- Species
- laubuca
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