Morphology Data of Batasio fluviatilis
Identification keys
Abnormalities
Main Ref. Ng, H.H. and M. Kottelat, 2007
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
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

Distinguished from all other species of the genus Batasio, except Batasio merianiensis in having an adult coloration consisting of a dark oblique predorsal bar and a dark spot on the sides of the body below the middle of the adipose-fin base. Differs from Batasio merianiensis by having length of adipose-fin base 30.0-33.3% SL (vs. 22.2) and eye diameter 18.2-23.5% SL (vs. 25.9) (Ref. 74340).

Ease of Identification

Meristic characteristics of Batasio fluviatilis

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 1
Finlets No. Dorsal   
Ventral  
Spines total 1 - 1
Soft-rays total 7 - 7
Adipose fin present

Caudal fin

Attributes forked; more or less normal

Anal fin(s)

Fins number 1
Spines total 4 - 5
Soft-rays total 8 - 9

Paired fins

Pectoral Attributes  more or less normal
Spines     1
Soft-rays   8 - 8
Pelvics Attributes  more or less normal
Position    abdominal  behind origin of D1
Spines     1
Soft-rays   5 - 5
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