Morphology Data of Betta ibanorum
Identification keys
Main Ref. Tan, H.H. and P.K.L. Ng, 2004
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral fusiform / normal
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales

Differs from other members of the species group by the following combination of characters: opercle without second postorbital stripe; eye color yellow when live; anal fin rays 27-29 (mode 28); subdorsal scales 5-6 (mode 5); lateral scales 30-32 (mode 30); predorsal scales 21-23 (mode 22); postdorsal scales 10-11 (mode 11); preanal length 45.8-49.4% SL; head length 31.7-36.4% SL; anal fin base length 50.0-55.8% SL (Ref. 55025).

Ease of Identification

Meristic characteristics of Betta ibanorum

Lateral Lines Interrupted: No
Scales on lateral line 30 - 32
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line 15 - 17
Scale rows below lateral line 6 - 7
Scales around caudal peduncle
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total 30 - 32


Dorsal fin(s)

Fins number
Finlets No. Dorsal   
Spines total 1 - 1
Soft-rays total 8 - 10
Adipose fin absent

Caudal fin

Attributes more or less truncate

Anal fin(s)

Fins number
Spines total 1 - 2
Soft-rays total 25 - 27

Paired fins

Pectoral Attributes  
Soft-rays   13 - 14
Pelvics Attributes  
Spines     1
Soft-rays   4 - 4
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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