Morphology Data of Kryptopterus hesperius
Identification keys
Main Ref. Ng, H.H., 2002
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral elongated
Cross section
Dorsal head profile clearly concave
Type of eyes
Type of mouth/snout
Position of mouth terminal
Type of scales

Head length 14.0-15.2% SL; head width 12.2-12.3% SL; body depth at anus 23.0-23.8% SL; eye diameter 25.6-27.9% HL; vomerine teeth present in single crescentic band; a distinct nuchal concavity; and mandibular barbels reaching beyond anterior base of anal fin. Fins hyaline, with small dark-brown spots occasionally present (Ref. 42937).

Description: dorsal fin with one simple ray; pelvic fin with i,7 rays (Ref. 42937).

Ease of Identification

Meristic characteristics of Kryptopterus hesperius

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
Gill clefts (sharks/rays only)
Gill rakers
on lower limb 13 - 14
on upper limb 3 - 3
total 16 - 17
total 57 - 57


Dorsal fin(s)

Fins number 1
Finlets No. Dorsal   
Spines total
Soft-rays total
Adipose fin absent

Caudal fin

Attributes forked; more or less normal

Anal fin(s)

Fins number
Spines total
Soft-rays total 78 - 79

Paired fins

Pectoral Attributes  
Soft-rays   11 - 12
Pelvics Attributes  
Soft-rays   8 - 8
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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