Callichrous ceylonensis is a Misapplied Synonym of Ompok bimaculatus and also a Valid Name or Synonym of another species as well.

Ompok bimaculatus (Bloch, 1794)

Butter Catfish - Kani pabda - Native Fish - Wild (Freshwater)

Systematic Position: [2]

Kingdom	:	Animalia
Phylum	:	Chordata
Class	:	Teleostei
Order	:	Siluriformes
Family	:	Siluridae
Genus	:	Ompok
Species	:	Ompok bimaculatus

Common Names:

English	:	Butter Catfish[729]
Bangla	:	Kani pabda[5] Boali pabda[5] Pupta[5] Pafta[5] Paibba[729]

Synonyms:

Silurus bimaculatus Bloch, 1794
Callichrous bimaculatus (Bloch, 1794)
Pseudosilurus bimaculatus (Bloch, 1794)
Wallago bimaculatus (Bloch, 1794)
Ompak bimaculatus (Bloch, 1794)
Silurus chechra Hamilton, 1822
Callichrous chechra (Hamilton, 1822)
Silurus duda Hamilton, 1822
Silurus affinis Swainson, 1839
Callichrus affinis (Swainson, 1839)
Silurus nebulosus Swainson, 1839
Callichrous nebulosus (Swainson, 1839)
Callichrus nebulosus (Swainson, 1839)
Silurus microcephalus Valenciennes, 1840 Jan
Wallago microcephalus (Valenciennes, 1840 Jan)
Silurus mysoricus Valenciennes, 1840 Jan
Pseudosilurus macropthalmos Blyth, 1860
Callichrous macrophthalmus (Blyth, 1860)
Pseudosilurus macropthalmus Blyth, 1860
Ompok siluroides (Non Lacepède, 1803 July)
Ompok canio (Non Hamilton, 1822)
Schilbe pabo (Non Hamilton, 1822)
Silurus canio (Non Hamilton, 1822)
Callichrus immaculatus (Non Swainson, 1839)
Silurus indicus (Non McClelland, 1842)
Callichrous gangeticus (Non Peters, 1861)
Callichrous ceylonensis (Non Günther, 1864)
Callichrous sindensis (Non Day, 1877 Aug)
Ompok sindensis (Non Day, 1877 Aug)
Wallago miostoma (Non Vaillant, 1902 Nov)
Wallago krattensis (Non Fowler, 1934 Jun)

Maximum Length and Weight:

>45 cm (TL) ^[347] 45 cm (TL) ^[5]

Inter-Length Relationship:

Head length : Total length : Standard length = 1 : 6-6.4 : 5-5.4 ^[5]
Body height : Total length : Standard length = 1 : 5-5.8 : 4.2-4.9 ^[5]
Eye Diameter : Head length = 1 : 4.6-5.4 ^[5]
Eye Diameter : Snout length = 1 : 1.5-2 ^[5]
Eye Diameter : Inter orbial width = 1 : 2.4-3 ^[5]

Taxonomic Formula:

D. 4; P₁. 12-15(1/11-14); P₂. 8; A. 66-73 ^{[Rahman, 2005]}
D 4; A ii-iii 57-58; P I 12-14; V i 7-8 ^{[Talwar and Jhingran, 1991]}
B XII-VII; D 8; A 60/75(2-3/58-72); P I/12-24; V 7-8; C 17 ^{[Shafi and Quddus, 1982]}
B xii-xiii; D 4; A 60/75 (2-3/58-72); P 1/14; V 8; C 17 ^{[Bhuiyan, 1964]}

Scales:

Scaleless. [5]

Chemistry:

Data not available

Conservation Status:

Global	:	Near Threatened (NT)	(Version 3.1) [525]
Bangladesh	:	Endangered (EN)	(Version 3.1) [222]

Occurrence/Distribution:

Global	:	Afghanistan[6] Bangladesh[70] India[37] Myanmar[832] Nepal[134] Pakistan[741] Sri Lanka[90]
Bangladesh	:	Padma river, Rajshahi[274] Chalan beel, Natore[490] Sunamganj haor region, Sunamganj[729] Kaptai reservoir (Kaptai lake), Rangamati[753] Mahananda River, Chapainawabganj[775] River Choto Jamuna, Naogaon[9] Chitra river, Jashore[793] Someshwari river, Netrokona[806] Atrai River, Dinajpur[815] Banar River, Mymensingh[1023] Tanguar Haor, Sunamganj[1025] Ramnabad river, Patuakhali[1163] Dekhar haor, Sunamganj[1164] Muhuri river, Feni[1165] Balla beel, Moulvibazar[1168] Titas river, Brahmanbaria[1169] Lohalia river, Patuakhali[1200]

Habitat and Environment:

Habitat:
Canal, Beel, Haor, Baor, River ^[347]

Environment:

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

Breeding Maturity:

First breeding maturity at-
22.3 cm in TL for Female in India ^[1049]
23.2 cm in TL for Male in India ^[1049]

Breeding Season: (red background)

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

[274]

Fecundity:

Absolute fecundity: 1,700 (min), 68,000 (max), Specimen length: 12-18 cm. ^[1002]

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:
400-500 BDT/kg (Size: 18-20 cm, Weight: 40-50 g, Place: Noakhali, Bangladesh) ^[792]