Morphology Data of Bagrus docmak
Identification keys
Main Ref. Brichard, P., 1978
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors

Descriptive characteristics of juvenile and adult

Striking features striking barbel(s)
Body shape lateral fusiform / normal
Cross section circular
Dorsal head profile more or less straight
Type of eyes more or less normal
Type of mouth/snout more or less normal
Position of mouth terminal
Type of scales scales embedded or partly/completely absent

Diagnosis: head depressed (Ref. 43434), broad, about 1.3-1.6 times as long as wide (Ref. 28714, 30488, 57125), squarish when viewed from above (Ref. 28714), without rough texture (Ref. 3034). Head width measured at base of preopercle 58.9-71.8% head length; 12-16 gill rakers on first gill arch (Ref. 81641). Body slightly elongated, 5-6 times longer than deep (Ref. 7324, 57125, 81641). Four pairs of barbels (Ref. 34290). Premaxillary tooth plate 5-7 times longer than wide, a little shorter than and about as broad as the band of vomerine teeth (Ref. 2899). Premaxillary toothplate width less than 2.5 times in head length (Ref. 57125). Occipital process 3-5 times longer than wide (Ref. 57125, 81641). Predorsal length 2.4-2.7 times in standard length; 9-10 branched dorsal fin rays, not or only slightly filamentous (Ref. 57125, 81641). Long adipose dorsal fin present (Ref. 34290), narrowly separated from the dorsal fin (Ref. 51936). Standard length/caudal peduncle length 2.4-2.7 (Ref. 57125). Upper lobe of caudal fin often with a short filament (Ref. 7324, 57125, 81641).

Description: head without rough texture (Ref. 3034). Snout broadly rounded, projecting beyond the lower jaw (Ref. 2988). Eye with a free border (Ref. 51936, Ref. 36901). Four pairs of circum-oral barbels, showing great variation in length, being relatively longer in smaller individuals (Ref. 34290). Maxillary barbel 1.2-3.25 times head length (Ref. 3032, Ref. 43434), reaching ventral or not quite so far in adult and reaching anal fin or caudal peduncle in juveniles (Ref. 2899). Nasal barbel 0.2-0.4 times head length (Ref. 367). External mandibular barbel 0.5-1 times head length (Ref. 3032). Internal mandibular barbel 0.36-0.64 times head length; occipital processus not reaching the interneural (Ref. 51936). Dorsal fin short with a well-developed spine (Ref. 34290). First branched fin rays of dorsal fin hardly or not filamentous (Ref. 30488, 81641), longest ray 1/3-1/4 of SL (Ref. 57125, 81641). Last ray of dorsal fin in front of inner ray of ventral fin (Ref. 4912). Dorsal spine smooth (Ref. 36900). Adipose dorsal fin 4-5x as long as deep (Ref. 43434), 1.66-2x as long as rayed dorsal (Ref. 2899). Anal fin short (Ref. 34290), 0.5-0.7x head length (Ref. 367), inserted under the last branched dorsal fin ray or just behind this (Ref. 2756). Some caudal fin rays may have filamentous extension (Ref. 34290). Upper caudal lobe comprised 3-4 times in SL (Ref. 81641). Caudal skeleton morphology described in Ref. 51975. Pectoral spine serrated along the inner side (Ref. 3032). No pectoral filaments (Ref. 367, 3036).

Coloration: dark grey-black above, creamy-white below (Ref. 34290). Body sometimes shot with gold and green (Ref. 4904). Some blackish may be present on the dorsal (Ref. 11235), anal and ventral fins (Ref. 2899). Blackish dots sometimes present on the posterior part of the back and on the adipose fin (Ref. 11235). Freshly caught fish have a greenish iridescence which soon fades to a dark greyish blue (Ref. 3023). Some juveniles may be completely blackish (Ref. 7324, 57125) with the exception of the ventral surface of the body(Ref. 81641). Some other specimens with dark brown spots on flanks and on adipose and caudal fin (Ref. 81641).

Ease of Identification

Meristic characteristics of Bagrus docmak

Lateral Lines 1 Interrupted: No
Scales on lateral line
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line
Scale rows below lateral line
Scales around caudal peduncle
Barbels 8
Gill clefts (sharks/rays only)
Gill rakers
on lower limb 8 - 12
on upper limb 3 - 5
total 11 - 17
total 46 - 49


Dorsal fin(s)

Attributes no striking attributes
Fins number 1
Finlets No. Dorsal   0 - 0
Ventral  0 - 0
Spines total 1 - 1
Soft-rays total 8 - 11
Adipose fin present

Caudal fin

Attributes forked

Anal fin(s)

Fins number 1
Spines total 0 - 0
Soft-rays total 11 - 14

Paired fins

Pectoral Attributes  more or less normal
Spines     1
Soft-rays   10 - 11
Pelvics Attributes  more or less normal
Position    abdominal  behind origin of D1
Spines     0
Soft-rays   1 - 6
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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