Morphology Data of Siganus luridus
Identification keys
Abnormalities
Main Ref. Woodland, D.J., 1990
Appearance refers to Male; Female
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors
Remarks

Descriptive characteristics of juvenile and adult

Striking features none
Body shape lateral fusiform / normal
Cross section compressed
Dorsal head profile more or less straight
Type of eyes more or less normal
Type of mouth/snout more or less normal
Position of mouth terminal
Type of scales cycloid scales
Diagnosis

Regional variation in color exists. Anterior spines of median fins slender and pungent, posterior spines stout, all venomous including that on the nape. Preopercular angle 87-97 degrees. Anterior nostril with a long, broad flap covering posterior nostril when depressed. Variable cheek scalation. Midline of thorax devoid of scales between the pelvic ridges.

Ease of Identification

Meristic characteristics of Siganus luridus

Lateral Lines 1 Interrupted: No
Scales on lateral line 142 - 153
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line 15 - 20
Scale rows below lateral line
Scales around caudal peduncle
Barbels 0
Gill clefts (sharks/rays only)
Gill rakers
on lower limb 17 - 20
on upper limb 4 - 6
total 21 - 26
Vertebrae
preanal 10 - 10
total 13 - 13

Fins

Dorsal fin(s)

Attributes extending over most of the back length
Fins number 1
Finlets No. Dorsal   0 - 0
Ventral  0 - 0
Spines total 13 - 14
Soft-rays total 10 - 10
Adipose fin absent

Caudal fin

Attributes more or less truncate; more or less normal

Anal fin(s)

Fins number 1
Spines total 7 - 7
Soft-rays total 9 - 9

Paired fins

Pectoral Attributes  more or less normal
Spines     0
Soft-rays   16 - 17
Pelvics Attributes  more or less normal
Position    thoracic  behind origin of D1
Spines     2
Soft-rays   3 - 3
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