Morphology Data of Hologymnosus annulatus
Identification keys
Abnormalities
Main Ref. Randall, J.E., G.R. Allen and R.C. Steene, 1990
Appearance refers to
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

Two-color forms: the 'true' species in the Indian Ocean and Red Sea and its sibling in the Pacific regions. Females look almost black; males mainly greenish with blue face, of which Indian form shows a white band central to the body, whilst the Pacific form a pale peduncular area when in nuptial mode (Ref. 48636). Juvenile H. annulatus very closely resemble juvenile Malacanthus latovittatus (Ref.1602). Poorly developed pharyngeal teeth (Ref. 1602).

Ease of Identification

Meristic characteristics of Hologymnosus annulatus

Lateral Lines 1 Interrupted: No
Scales on lateral line 100 - 118
Pored lateral line scales 100 - 118
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 19 - 23
Vertebrae
preanal
total

Fins

Dorsal fin(s)

Attributes no striking attributes
Fins number 1
Finlets No. Dorsal   0 - 0
Ventral  0 - 0
Spines total 9 - 9
Soft-rays total 12 - 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 12 - 12

Paired fins

Pectoral Attributes  more or less normal
Spines     0
Soft-rays   13 - 13
Pelvics Attributes  more or less normal
Position    thoracic  behind origin of D1
Spines     
Soft-rays   
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