Batasio tengana is a valid scientific name.

Batasio tengana (Hamilton, 1822)

- Tengra - Native Fish - Wild (Freshwater)

Systematic Position: [2]

Kingdom	:	Animalia
Phylum	:	Chordata
Class	:	Teleostei
Order	:	Siluriformes
Family	:	Bagridae
Genus	:	Batasio
Species	:	Batasio tengana

Common Names:

English	:	Data not available
Bangla	:	Tengra[5]

Synonyms:

Pimelodus tengana Hamilton, 1822
Bagrus tengana (Hamilton, 1822)
Gagata tengana (Hamilton, 1822)
Macrones tengana (Hamilton, 1822)
Batasio affinis (Non Blyth, 1860)
Macrones affinis (Non Blyth, 1860)
Macrones marianiensis (Non Chaudhuri, 1913)

Maximum Length and Weight:

9 cm (TL) ^[6]

Inter-Length Relationship:

Head length : Total length : Standard length = 1 : 4.7-4.9 : 3.8-3.9 ^[5]
Body height : Total length : Standard length = 1 : 5.8-6.3 : 4.7-5 ^[5]
Eye Diameter : Head length = 1 : 4 ^[5]
Eye Diameter : Snout length = 1 : 1.3 ^[5]
Eye Diameter : Inter orbial width = 1 : .8 ^[5]

Taxonomic Formula:

D. II/7; P₁. 1/7-8; P₂. 1/5; A. 3/11-12; C. 15 ^{[Rahman, 2005]}
D I 7; A iii-iv 9-11; P I 7-9; V i 5 ^{[Talwar and Jhingran, 1991]}

Scales:

Scaleless. [5]

Chemistry:

Data not available

Conservation Status:

Global	:	Least Concern (LC)	(Version 3.1) [520]
Bangladesh	:	Endangered (EN)	(Version 3.1) [216]

Occurrence/Distribution:

Global	:	Bangladesh[70] India[6] Myanmar[742] Thailand[854]
Bangladesh	:	Old brahmaputra, Mymensingh[5] Chalan beel, Natore[490] Kaptai reservoir (Kaptai lake), Rangamati[753] Someshwari river, Netrokona[806] Tanguar Haor, Sunamganj[1025]

Habitat and Environment:

Habitat: Data not available

Environment:

Parameters	Units	Minimum	Maximum	Optimum	Ref.
Temperature	-	-	-	-	-
pH	-	-	-	-	-
DO	-	-	-	-	-
Free CO2	-	-	-	-	-

Breeding Maturity:

Data not available

Breeding Season: (red background)

Data not available

Fecundity:

Data not available

Food and Feeding Habit:

Diet composition (%): Data not available

Importance:

Production and Marketing:
Production/Harvesting Season: (Green = Peak, Yellow = Off, Lemon = Moderate)

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

[792]

Harvesting Gears:
Seine net, Push net, Cast net ^[792]
Market price:
200-250 BDT/kg (Size: 5-7 cm, Weight: 10-15 g, Place: Noakhali, Bangladesh) ^[792]