Gymnostomus ariza (Hamilton, 1807)
Reba
Bata,  Bhagna,  Reba,  বাটা,  বাংনা
Gymnostomus ariza
photo by Khan, M.M.

Family:  Cyprinidae (Minnows or carps), subfamily: Labeoninae
Max. size:  30 cm SL (male/unsexed); max.weight: 1,360.0 g
Environment:  benthopelagic; freshwater, potamodromous
Distribution:  Asia: Indus plain and adjoining hilly areas (Pakistan); (Ganges-Brahmaputra basin (India, Nepal, Bangladesh); Mahanadi, Krishna, Cuvery, and some smaller basins in southern India; Karnapouli and adjacent smaller basins in Chittagong Hill Tracts (Bangladesh) (Ref. 33488). Reported from Myanmar (Ref. 41236).
Diagnosis:  Dorsal spines (total): 0-0; Dorsal soft rays (total): 8-9; Vertebrae: 34-35. Body with thin stripes mostly above lateral line; larger fish sometimes with a broad midlateral stripe (not observed in other Cirrhinus. Color in life variable, overall dull dirty white or greyish, silvery or yellow, thin stripes vary from subdued to bold.
Biology:  Found in clear rivers and tanks, ponds, beels, and inundated fields. Feeds on plankton and detritus. Grows fairly rapid. Breeds in flooded shallows from June to September. A prolific breeder, laying about 3 million ova per female. A suitable species for aquaculture. Contributes 10 to 15% of the fishery in Cauvery.
IUCN Red List Status: Least Concern (LC); Date assessed: 21 March 2010 Ref. (130435)
Threat to humans:  harmless
Country info:  Recorded from the Ganges-Brahmaputra basin, Karnapouli and adjacent smaller basins in Chittagong Hill tracts (Ref. 33488). Found in rivers, streams, canals, ponds, beels, and inundated fields throughout the country. Also Ref. 4832, 39989, 43640, 56321.


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