Morphology Summary - Johnius javaensis
Morphology Data of Johnius javaensis
Identification keys
Abnormalities
Main Ref. Lin, B., J.J. Pogonoski, Fahmi, K. Wibowo, N.L. Chao and M. Seymour, 2025
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  (shape guide) fusiform / normal
Cross section oval
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

This species is distinguished from its congeners by the following set of characters: five vesicular mental barbels on the chin; 11 or 12 swim-bladder appendages, and the ventral margin of the sagitta head expanded into a distinct convexity (Ref. 138397).

Ease of Identification

Meristic characteristics of Johnius javaensis

Lateral Lines Interrupted: No
Scales on lateral line
Pored lateral line scales 46 - 48
Scales in lateral series
Scale rows above lateral line 4 - 5
Scale rows below lateral line 7 - 8
Scales around caudal peduncle
Barbels
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total
Vertebrae
preanal 11 - 11
total 25 - 25

Fins

Dorsal fin(s)

Attributes
Fins number 2
Finlets No. Dorsal   
Ventral  
Spines total 6 - 6
Soft-rays total 30 - 32
Adipose fin absent

Caudal fin  (shape guide)

Attributes

Anal fin(s)

Fins number 1
Spines total 2 - 2
Soft-rays total 7 - 7

Paired fins

Pectoral Attributes  
Spines     
Soft-rays   17 - 18
Pelvics Attributes  
Position    
Spines     
Soft-rays   
(e.g. 9948)
(e.g. oophagy)
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