Morphology Data of Polynemus bidentatus
Identification keys
Main Ref. Motomura, H. and S. Tsukawaki, 2006
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
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales

This species is distinguished by the following characters: D1 VIII; D2 I, 16; pectoral-fin filaments 7 (6th filament longest); pectoral -fin rays 17; anal-fin spines 3; pored lateral-line scales 70; gill rakers 32; vomerine teeth separated at midline, forming two toothed patches; swimbladder absent; depth at posterior margin of maxilla greater than orbit diameter; relatively long snout length (6.8% of SL), upper-jaw length (13.8% of SL), first pelvic-fin soft ray length (17.2% of SL), and upper caudal-fin lobe length (38.1% of SL); relatively short pectoral-fin length (32.6% of SL), longest pectoral-fin filament length (158.7% of SL), and third anal-fin soft ray length (15.8% of SL); relatively small orbit diameter (2.2% of SL); ventroposterior part of the pectoral fin black (Ref. 58087).

Ease of Identification

Meristic characteristics of Polynemus bidentatus

Lateral Lines Interrupted: No
Scales on lateral line
Pored lateral line scales 70 - 70
Scales in lateral series
Scale rows above lateral line
Scale rows below lateral line
Scales around caudal peduncle
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total 32 - 32


Dorsal fin(s)

Fins number 2
Finlets No. Dorsal   
Spines total 9 - 9
Soft-rays total 16 - 16
Adipose fin

Caudal fin


Anal fin(s)

Fins number
Spines total 3 - 3
Soft-rays total

Paired fins

Pectoral Attributes  
Soft-rays   17 - 17
Pelvics Attributes  
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Capuli, Estelita Emily
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