Morphology Data of Upeneus japonicus
Identification keys
Main Ref. Uiblein, F. and D.C. Gledhill, 2014
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 fusiform / normal
Cross section oval
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth

This species is distinguished by the following characters: D VII + 9; pectoral fins 13-15; gill rakers 6-8 + 18-21 = 24-28. Adult measurements as %SL: body depth at first dorsal-fin origin 21-25 and at anus 18-22; caudal-peduncle depth 8.0-11; maximum head depth 18-21 and through eye 15-17; head length 27-31; orbit length 6.1-8.2; upper jaw length 9.7-12; barbel length 18-23; caudal-fin length 25-29; anal-fin height 15-19; pelvic-fin length 19-23; pectoral-fin length 21-25; first dorsal-fin height 20-24 and second dorsal-fin height 15-19. Colouration: upper caudal-fin lobe in fresh fish with 3-4 red oblique bars while lower caudal-fin lobe almost entirely covered by a broad red stripe that becomes darker distally and is partially surrounded by a dark grey line and by a contrasting white fin margin and white lobe tip exteriorly; there are only weak indications of upper caudal fin lobe bars in preserved specimens with a dark pigmented zone remaining distally at the lower lobe; barbels are yellow; without lateral body stripes; head and body white or silvery ventrally and laterally, sometimes covered with red blotches, and uniformly red dorsally of lateral line; preserved fish are pale brown or brown (Ref. 98481).

Description: Differs from other Upeneus with 7-spined dorsal fin in generally having14 pectoral fin rays; 7 + 18 gill rakers; 29 - 30 + 2 lateral line scales; teeth on ectopterygoid present; and, dark brown or black peritoneum (Ref. 43139).

Ease of Identification

Meristic characteristics of Upeneus japonicus

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 18 - 21
on upper limb 6 - 8
total 24 - 28


Dorsal fin(s)

Fins number 2
Finlets No. Dorsal   
Spines total 7 - 7
Soft-rays total
Adipose fin

Caudal fin


Anal fin(s)

Fins number
Spines total
Soft-rays total

Paired fins

Pectoral Attributes  
Spines     0
Soft-rays   13 - 15
Pelvics Attributes  
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Capuli, Estelita Emily
Modified by Capuli, Estelita Emily
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cfm script by eagbayani, 17.10.00, php script by rolavides, 13/03/08 ,  last modified by sortiz, 06.27.17