Morphology Data of Gymnothorax tile
Identification keys
Main Ref. Talwar, P.K. and A.G. Jhingran, 1991
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
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales

Body moderately elongate, cylindrical in front, compressed along tail; eyes small; teeth very sharp, more or less in two rows, inner series larger (Ref. 4832).

Description: Characterized by body depth at gill opening 16-23 in TL; origin of dorsal fin slightly anterior to gill opening; anus posterior to or near middle of body; conical teeth in two rows on side of upper jaw; three large median premaxillary teeth; vomer with two irregular rows of conical teeth (Ref. 90102). Predorsal vertebra 7-12 (Ref. 92337).

Ease of Identification

Meristic characteristics of Gymnothorax tile

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
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
preanal 55 - 58
total 120 - 130


Dorsal fin(s)

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

Caudal fin

Attributes confluent

Anal fin(s)

Fins number
Spines total
Soft-rays total

Paired fins

Pectoral Attributes  absent
Spines     0
Soft-rays   0 - 0
Pelvics Attributes  suppressed/absent
Position    absent
Spines     0
Soft-rays   0 - 0
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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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