Morphology Data of Halichoeres argus
Identification keys
Abnormalities
Main Ref. Randall, J.E., 1980
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance always different morphology between mature adults
Different colors
Remarks

Descriptive characteristics of juvenile and adult

Striking features
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

Young green when in seagrasses and greenish brown on reefs. Recognized by the unusual color patterns on the cheek or the black spotted scales over the back (Ref. 48636). Preserved male specimens with pale spots on scales; dark spot behind eye (continuous with a bifurcating dark band which extends ventrally); another on opercle; a dark band on snout from upper lip to eye; head with bands; spot on upper caudal base may be present or absent (present in females). Anterior lateral line scales with 1-3 pores (usually 2); 5-6 suborbital pores. Anterior dorsal and anal soft rays longer than posterior rays; pelvic fins of males relatively short, not reaching anus.

Ease of Identification

Meristic characteristics of Halichoeres argus

Lateral Lines 1 Interrupted: No
Scales on lateral line 28 - 28
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line
Scale rows below lateral line
Scales around caudal peduncle
Barbels 0
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total 17 - 19
Vertebrae
preanal
total 25 - 25

Fins

Dorsal fin(s)

Attributes extending over most of the back length
Fins number 1
Finlets No. Dorsal   
Ventral  
Spines total 9 - 9
Soft-rays total 11 - 12
Adipose fin absent

Caudal fin

Attributes more or less truncate; more or less normal

Anal fin(s)

Fins number 1
Spines total 3 - 3
Soft-rays total 11 - 12

Paired fins

Pectoral Attributes  more or less normal
Spines     0
Soft-rays   14 - 14
Pelvics Attributes  more or less normal
Position    thoracic  behind origin of D1
Spines     1
Soft-rays   5 - 5
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