Morphology Summary - Ambassis octava
Morphology Data of Ambassis octava
Identification keys
Abnormalities
Main Ref. Ghazali, S.Z., S. Lavoué, S.A. Mohd Nor and A.H. Muhammad‑Rasul, 2023
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) short and / or deep
Cross section compressed
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

This species is distinguished from its congeners by the following set of characters: a single backwardly oriented supraorbital spine; absence of nasal spine; lower margin of interopercle smooth; preorbital ridge smooth; transverse scale rows on cheek 2; predorsal scales 13 or 14; scale rows between anal-fin origin and lateral line 7 or 8 (modally 8); scale rows between dorsal-fin origin and lateral line 5. Body compressed, relatively deep, its height 44.6 to 51.2% of SL; caudal peduncle robust, its height 16.7 to 18.9% of SL; second dorsal-fin spine (DH2) longer than third dorsal-fin spine (DH3) (DH2/DH3 > 1); second anal-fin spine (AH2) shorter than third anal-fin spine (AH3) (AH2/AH3 < 1). (Ref. 137821).

Ease of Identification

Meristic characteristics of Ambassis octava

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
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total
Vertebrae
preanal
total

Fins

Dorsal fin(s)

Attributes
Fins number 2
Finlets No. Dorsal   
Ventral  
Spines total 8 - 8
Soft-rays total 11 - 11
Adipose fin absent

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   16 - 17
Pelvics Attributes  
Position    
Spines     1
Soft-rays   5 - 5
(e.g. 9948)
(e.g. oophagy)
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