Morphology Data of Dysomma polycatodon
Identification keys
Main Ref. Ho, H.-C., D.G. Smith and K.A. Tighe, 2015
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 eel-like
Cross section oval
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales

This species is distinguished by the following characters: with pectoral fin; dorsal-fin origin anterior to level of pectoral fin base, predorsal length 10.0-12.9% TL; anus anterior, just below pectoral fin, preanal length 15.5-18.2% TL; very short trunk, its length 2.4-3.9% TL; intermaxillary teeth 2; compound teeth on vomer 3; upper jaw with 3 or 4 rows small sharp teeth; lower jaw with a single row of 2 large anterior teeth followed by 22-31 small sharp teeth; head pores: IO 4, SO 3, M 6, POP 0 (1 with 1), AD 1 (1with 0); lateral-line pores: predorsal 3-5, prepectoral 5-7, preanal 8-11, and total 65-78, the last at about anterior two-thirds of total length; MVF 8-13-130, total vertebrae 128-133 (1 with 120); colour of body light grayish to brown dorsally, paler ventrally; posterior half of anal-fin base deep brown, and dorsal and anal fins with white margins (Ref. 106136).

Ease of Identification

Meristic characteristics of Dysomma polycatodon

Lateral Lines Interrupted: No
Scales on lateral line
Pored lateral line scales 65 - 78
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 128 - 133


Dorsal fin(s)

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

Caudal fin


Anal fin(s)

Fins number
Spines total
Soft-rays total

Paired fins

Pectoral Attributes  
Pelvics Attributes  
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Capuli, Estelita Emily
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cfm script by eagbayani, 17.10.00, php script by rolavides, 13/03/08 ,  last modified by sortiz, 06.27.17