Morphology Summary - Labroides phthirophagus
Morphology Data of Labroides phthirophagus
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) fusiform / normal
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; pectoral-fin rays 13-14; upper procurrent caudal-fin rays 6, lower 7; principal caudal-fin rays 8 + 7; circumpeduncular scales 18-20; body depth 3.3-4.5 in SL; head length 2.9-3.1 in SL; snout length 3.0-3.7 in HL; orbit diameter 3.9-5.1 in HL; orbit diameter 1.2-1.5 in snout length; caudal-peduncle length 2.4-3.9 in HL; pored lateral-line scales 25-29; scale rows above lateral line 3, below lateral line 9-10; total gill rakers 12-14. Colouration: head and anterior body bright yellow with a median lateral black stripe constricted to about origin of anal fin, expanding past this point toward outer edge of caudal fin; upper and lowermost edge of caudal fin magenta (Ref, 138889).

Ease of Identification

Meristic characteristics of Labroides phthirophagus

Lateral Lines Interrupted: No
Scales on lateral line
Pored lateral line scales 25 - 26
Scales in lateral series
Scale rows above lateral line 3 - 3
Scale rows below lateral line 9 - 10
Scales around caudal peduncle 18 - 20
Barbels
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total 12 - 14
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 - 10

Paired fins

Pectoral Attributes  
Spines     
Soft-rays   13 - 14
Pelvics Attributes  
Position    
Spines     1
Soft-rays   5 - 5
(e.g. 9948)
(e.g. oophagy)
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