Morphology Data of Acanthurus gahhm
Identification keys
Abnormalities
Main Ref. Masuda, H., K. Amaoka, C. Araga, T. Uyeno and T. Yoshino, 1984
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs no special organs
Different appearance males alike females
Different colors different colors in juveniles and adults
Remarks

Descriptive characteristics of juvenile and adult

Striking features none
Body shape lateral short and / or deep
Cross section compressed
Dorsal head profile clearly convex
Type of eyes more or less normal
Type of mouth/snout more or less normal
Position of mouth terminal
Type of scales
Diagnosis

Characterized by having 2 longitudinal bands on the side, one from the hind margin of the eye posteriorly, another from the groove around the caudal peduncle spine anteriorly. Juveniles of less than 5 cm SL lack the anterior band; less than 10 cm SL lack the posterior band. Reaches 24 cm SL.

Ease of Identification

Meristic characteristics of Acanthurus gahhm

Lateral Lines Interrupted: No
Scales on lateral line
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
Vertebrae
preanal
total

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 9 - 9
Soft-rays total 24 - 28
Adipose fin absent

Caudal fin

Attributes more or less truncate

Anal fin(s)

Fins number 1
Spines total 3 - 3
Soft-rays total 23 - 26

Paired fins

Pectoral Attributes  more or less normal
Spines     0
Soft-rays   16 - 17
Pelvics Attributes  more or less normal
Position    abdominal  behind origin of D1
Spines     1
Soft-rays   5 - 5
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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