Morphology Data of Thalassoma jansenii
Identification keys
Abnormalities
Main Ref. Myers, R.F., 1991
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 fusiform / normal
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

Color pattern remains similar throughout life. Large juveniles and females are mostly black with a single white band and white area below the head to the anus. Males retain the white central band but is more yellow, and develops a second narrow band halfway towards the head (Ref. 48636). Initial phase white with 3 black bars, the first on upper half of head and anterior body containing a yellow streak at edge of opercle, the second across dorsal fin and ventrally to anus, the third covering most of body and posterior portions of dorsal and anal fins. Terminal male with yellow between black bars. Pectoral fins bluish (Ref 9823).

Ease of Identification

Meristic characteristics of Thalassoma jansenii

Lateral Lines 1 Interrupted: No
Scales on lateral line 27 - 27
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 21 - 21
Vertebrae
preanal
total

Fins

Dorsal fin(s)

Attributes
Fins number
Finlets No. Dorsal   
Ventral  
Spines total 8 - 8
Soft-rays total 13 - 13
Adipose fin

Caudal fin

Attributes

Anal fin(s)

Fins number
Spines total 3 - 3
Soft-rays total 11 - 11

Paired fins

Pectoral Attributes  
Spines     
Soft-rays   15 - 16
Pelvics Attributes  
Position    
Spines     
Soft-rays   
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