Morphology Data of Hemigymnus melapterus
Identification keys
Abnormalities
Main Ref. Randall, J.E., 2013
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

This species is distinguished by the following characters: gill rakers 26-29; small juveniles dark brown, green on snout and interorbital, with a slightly oblique white bar from front of dorsal fin to abdomen, and 2 narrow pale yellowish bars below soft portion of dorsal fin that fade ventrally; larger juveniles have a white bar from origin of dorsal fin, passing beneath pectoral fin onto abdomen; head and body anterior to bar greyish green, posterior to bar black; posterior caudal peduncle and caudal fin yellow, often with 1 or 2 small black spots centrally near base: small females with body posterior to a curving demarcation between origins of dorsal and anal fins blackish with a narrow dark greenish bar on each scale, grading to yellow with blue-green spots posteriorly on caudal peduncle and fin; large females dark green posterior to oblique demarcation on body, the scales rimmed in black, with a vertical green line or spot on each scale; head and anterior body light green dorsally, pale blue-green ventrally, have irregular bands on snout and above eye, and a large complex marking behind eye; body of males posterior to demarcation dark green, each scale with narrow pale blue-green and black posterior margin; head green dorsally with irregular green to blue-green bands, including a blue ring around eye; cheek and operculum pinkish white with irregular light blue lines and spots, except for a large yellowish green blotch centrally on cheek without markings; lips and ventral part of head mainly pale blue; chest and abdomen pinkish white with a light blue spot or arc on scales (Ref. 93095).

Ease of Identification

Meristic characteristics of Hemigymnus melapterus

Lateral Lines 1 Interrupted: No
Scales on lateral line 27 - 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 21
on upper limb 8
total 26 - 29
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 10 - 11
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 - 11

Paired fins

Pectoral Attributes  more or less normal
Spines     0
Soft-rays   13 - 14
Pelvics Attributes  more or less normal
Position    thoracic  behind origin of D1
Spines     
Soft-rays   
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Reyes, Rodolfo B.
Modified by Capuli, Estelita Emily
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