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Chanda nama, commonly known as the Glassfish, is a small, freshwater fish belonging to the family Ambassidae. It is renowned for its almost transparent body, which allows its internal organs and skeletal structure to be visible. This transparency serves as a form of camouflage in its natural habitat. It is a schooling fish, typically found in clear, slow-moving waters.
Physical Characteristics
- Body shape
- compressed
- Coloration
- Predominantly transparent, with a silvery sheen on the operculum and belly. Some individuals may exhibit a faint yellowish or greenish tint. The internal organs are visible through the translucent body.
- Scale type
- cycloid
- Mouth position
- superior
- Distinctive features
- Highly transparent body, Two distinct dorsal fins, the first spiny and the second soft-rayed, Large eyes, Laterally compressed body
- Dorsal fin
- Two dorsal fins: the first with 7-8 spines, the second with 1 spine and 9-11 soft rays. The first dorsal fin is notably higher in males, especially during breeding.
- Tail fin
- Forked caudal fin with 17 principal rays.
- Pectoral fin
- Pectoral fins are relatively small, with 11-12 rays.
- Distinctive fins
- Anal fin with 3 spines and 9-11 soft rays. Pelvic fins with 1 spine and 5 soft rays.
Identification Tips
Transparency
The most striking feature is its almost completely transparent body, allowing internal organs to be seen. This distinguishes it from most other small freshwater fish.
Dorsal Fins
Possesses two distinct dorsal fins. The first is spiny and often elevated, especially in mature males. This is a key characteristic of the Ambassidae family.
Body Shape
Its body is strongly compressed laterally and relatively deep, giving it a 'knife-like' profile when viewed head-on.
Size
Typically small, rarely exceeding 10 cm in total length.
Habitat
- Water type
- freshwater
- Depth
- Typically found in shallow waters, often near the surface or in mid-water columns.
- Environment
- Inhabits slow-moving or stagnant freshwater bodies such as rivers, streams, canals, ponds, and ditches. Prefers areas with dense aquatic vegetation for cover and foraging. Can tolerate slightly brackish conditions in estuaries.
- Geographic range
- Native to South Asia, primarily found in India, Bangladesh, Nepal, Pakistan, and Myanmar. Its distribution extends across the Ganges-Brahmaputra basin and other river systems in the region.
Aquarium Information
- Care level: intermediate
- Temperament: peaceful
- Diet: carnivore
- Minimum tank size: 20 gallons (75 liters)
- Temperature: 20-28°C (68-82°F)
- pH level: 6.5-7.5
- Hardness: 5-15 dGH
- Compatibility: Peaceful community fish, best kept with other small, non-aggressive species. Avoid fin-nippers or overly boisterous tankmates.
- Special requirements: Requires a well-planted aquarium with open swimming spaces. Prefers to be kept in schools of 6 or more individuals to reduce stress and encourage natural behavior. Sensitive to poor water quality. Often sold dyed in the aquarium trade, which is detrimental to their health; seek undyed specimens.
Wild Information
- Conservation status: least concern
- Seasonality: Breeds during the monsoon season (June to September) in its native range, when water levels are high and food is abundant.
- Market price: Low (for food fish), Moderate (for aquarium trade, especially undyed specimens)
- Commercial importance: medium
- Taste: Mild, slightly sweet
- Texture: Delicate, flaky
- Cooking methods: Frying, Curry, Steaming
- Nutritional value: Good source of protein and omega-3 fatty acids, though typically consumed in small quantities due to size.
Key Facts
Natural Camouflagebehavior
The extreme transparency of Chanda nama serves as an effective camouflage mechanism, making it difficult for predators to spot them in clear water.
Sexual Dimorphismbehavior
Males of Chanda nama develop a significantly higher first dorsal fin during breeding season, which is used in courtship displays.
Aquarium Trade Misconceptioninteresting
Many 'Glassfish' sold in the aquarium trade are artificially dyed with fluorescent colors, a practice that is harmful to the fish and significantly shortens their lifespan. Undyed specimens are preferred by ethical aquarists.
Dietary Habitsbehavior
Despite their delicate appearance, Chanda nama are carnivorous, primarily feeding on small invertebrates such as insect larvae and zooplankton.
Safety Information
Safe- Safety level: safe
- Venomous: No
- Edibility: edible
- Handling notes: No specific handling precautions are required beyond general care for small, delicate fish. Avoid excessive stress or rough handling due to their fragile nature.
Similar Species
Indian Glassy Perch
Parambassis ranga
P. ranga is generally deeper-bodied and less elongated than C. nama. While also transparent, P. ranga often has a more pronounced golden or yellowish tint and may exhibit a dark spot behind the operculum. The first dorsal fin of C. nama is typically higher and more pointed, especially in males.
Burmese Glassfish
Parambassis pulcinella
P. pulcinella is distinguished by a prominent nuchal hump (a 'humpback' appearance) in mature individuals, which is absent in C. nama. P. pulcinella also tends to be larger.
Scientific Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Actinopterygii
- Order
- Perciformes
- Family
- Ambassidae
- Genus
- Chanda
- Species
- Chanda nama
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