Morphology Data of Arius arius
Identification keys
Abnormalities
Main Ref. Kailola, P.J., 1999
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors
Remarks

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral elongated
Cross section
Dorsal head profile more or less straight
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

Head shield smooth anteriorly with a series of granules and rugae posteriorly. Adipose fin with a large black spot. Lateral line bifurcating at the base of tail. Gill rakers present on the hind aspect of all gill arches. Dorsal spine with a filament at its tip. Moderately deep caudal peduncle, 1.5 to 2.1 (mean 1.8) in its depth. (Ref. 38478).

Ease of Identification

Meristic characteristics of Arius arius

Lateral Lines 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
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total 14 - 17
Vertebrae
preanal
total

Fins

Dorsal fin(s)

Attributes
Fins number 1
Finlets No. Dorsal   
Ventral  
Spines total 1 - 1
Soft-rays total
Adipose fin present

Caudal fin

Attributes forked; more or less normal

Anal fin(s)

Fins number 1
Spines total
Soft-rays total 17 - 22

Paired fins

Pectoral Attributes  more or less normal
Spines     1
Soft-rays   
Pelvics Attributes  more or less normal
Position    abdominal  behind origin of D1
Spines     0
Soft-rays   
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