Morphology Summary - Labroides inopinatus
Morphology Data of Labroides inopinatus
Identification keys
Abnormalities
Main Ref. Tea, Y.-K., L. Baraf, Y. Menkara, W.B. Ludt, G.R. Allen, J.-P.A. Hobbs and P.F. Cowman, 2026
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors
Remarks

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral  (shape guide) elongated
Cross section compressed
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

This species is distinguished by the following characters: D IX,11; A III,10-11; pectoral-fin rays 13; upper procurrent caudal-fin rays 5-6; lower procurrent caudal-fin rays 5-7; principal caudal-fin rays 7-8 + 7; circumpeduncular scales 24 (22-24); body depth 3.8-4.5 in SL; head length 2.6-3.0 in SL; snout length 2.9-3.5 in HL; orbit diameter 4.0-5.6 in HL; orbit diameter 1.3-1.8 in snout length; caudal-peduncle length 4.8-6.2 in HL; pored lateral-line scales 33-36; scale rows above lateral line 4, below lateral line 13-14; total gill rakers 11-13 (Ref. 138889).

Colouration: Terminal phase with dorsal half of head and ground colouration of body mustard yellow to brown; lower portion of head silvery grey, fading to pale grey on isthmus and breast; snout with a horizontal orange brown stripe, from lateral side of upper lip to anterior edge of orbit, its width is subequal to that of pupil; stripe continuing horizontally through orbit, its width expanding slightly towards free upper edge of opercle; a stripe continuing past opercle and blending with ground colouration of body; snout with a second, cream to silvery white stripe, from the dorsal aspect of upper lip, curving slightly and continuing through dorsal aspect or orbit, past free upper edge of opercle and through to upper edge of caudal fin; dorsal fin is dusky mustard yellow, dusky hyaline distally; anal fin is similar to dorsal fin; caudal fin is dusky yellow, becoming increasingly fuliginous distally; caudal fin with a narrow, bright white, crescentic margin; upper portion of crescentic margin continuing from terminal end of cream to silvery white body stripe; the upper and lower lobes of caudal fin beyond margin translucent; pelvic fins are white to translucent grey; pectoral fins hyaline, The Initial Phase and juveniles in life with similar colour except ground colouration is dusky grey to grey-brown (Ref. 138889).

Ease of Identification

Meristic characteristics of Labroides inopinatus

Lateral Lines Interrupted: No
Scales on lateral line
Pored lateral line scales 33 - 36
Scales in lateral series
Scale rows above lateral line 4 - 4
Scale rows below lateral line 13 - 14
Scales around caudal peduncle 22 - 24
Barbels
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total 11 - 13
Vertebrae
preanal 10 - 10
total 25 - 25

Fins

Dorsal fin(s)

Attributes
Fins number 1
Finlets No. Dorsal   
Ventral  
Spines total 9 - 9
Soft-rays total 11 - 11
Adipose fin

Caudal fin  (shape guide)

Attributes

Anal fin(s)

Fins number 1
Spines total 3 - 3
Soft-rays total 10 - 11

Paired fins

Pectoral Attributes  
Spines     0
Soft-rays   13 - 13
Pelvics Attributes  
Position    
Spines     1
Soft-rays   5 - 5
(e.g. 9948)
(e.g. oophagy)
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