Morphology Data of Opsariichthys bidens
Identification keys
Main Ref. Kottelat, M., 2001
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

Adult male with projecting anal fin rays; conspicuous symphyseal knob in lower jaw; origin of dorsal fin slightly in front of anal origin; sexual dichromatism, female with plain body, male with irregular dark bars (Ref. 43281). Caudal peduncle scales modally 18; 19-21 pre-dorsal scales; 9 scales above lateral line; and 3 scales below the lateral line (Ref. 95038).

Ease of Identification

Meristic characteristics of Opsariichthys bidens

Lateral Lines Interrupted: No
Scales on lateral line 45 - 46
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line 9 - 9
Scale rows below lateral line 3 - 4
Scales around caudal peduncle 17 - 19
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total 41 - 42


Dorsal fin(s)

Fins number 1
Finlets No. Dorsal   0 - 0
Ventral  0 - 0
Spines total
Soft-rays total 10 - 10
Adipose fin absent

Caudal fin

Attributes forked; more or less normal

Anal fin(s)

Fins number
Spines total
Soft-rays total 11 - 12

Paired fins

Pectoral Attributes  more or less normal
Soft-rays   15 - 16
Pelvics Attributes  more or less normal
Position    abdominal
Soft-rays   9 - 9
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Torres, Armi G.
Modified by Torres, Armi G.
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