Morphology Data of Betta ideii
Identification keys
Abnormalities
Main Ref. Tan, H.H. and P.K.L. Ng, 2006
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 fusiform / normal
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

Presence of an orange patch in front of eye continuous to upper jaw when live (pale yellow to white when preserved, character shared with Betta patoti). Large males almost totally jet black or dark brown when preserved. Anal fin with 32-33 rays. Dorsal fin with 8-9 rays. Lateral line with 34 1/2-35 scales. Predorsal scales 25-27. Predorsal length 67.8-69.5% SL (Ref. 57022).

Ease of Identification

Meristic characteristics of Betta ideii

Lateral Lines Interrupted: No
Scales on lateral line 34 - 35
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 1
Finlets No. Dorsal   
Ventral  
Spines total 0 - 1
Soft-rays total 8 - 9
Adipose fin absent

Caudal fin

Attributes more or less truncate

Anal fin(s)

Fins number
Spines total 1 - 2
Soft-rays total 30 - 32

Paired fins

Pectoral Attributes  
Spines     
Soft-rays   14 - 14
Pelvics Attributes  
Position    before origin of D1
Spines     
Soft-rays   
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