Morphology Data of Trimma hamartium
Identification keys
Main Ref. Winterbottom, R., 2018
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 elongated
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: no scales on the cheeks and opercle; 8-9 scales in predorsal midline; short second dorsal spine reaching to a mean of the base of the first ray of the second dorsal fin when abducted; pectoral-fin rays 17-19 with 5-10 branched rays in the middle of the fin; an unbranched 5th pelvic-fin ray, 51-64% the length of 4th ray; total gill rakers 17-19; papillae in row c 6, below the eye; U-shaped bony interorbital with a narrow slit-like postorbital trench which ends at the posteriormost papilla in row p; colour when freshly collected, a reddish head with 3-4 yellow bars on the cheek, red iris with four yellow spots, yellow body which is lighter posteriorly, scales pockets outlined with melanophores and scale rows above and below midlateral row much lighter posterior to second dorsal fin origin (giving appearance of three yellow stripes on body); colour when preserved with fairly evenly distributed melanophores over the dorsal surface of the snout (Ref. 116838).

Ease of Identification

Meristic characteristics of Trimma hamartium

Lateral Lines Interrupted: No
Scales on lateral line 23 - 24
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line
Scale rows below lateral line
Scales around caudal peduncle 12 - 12
Gill clefts (sharks/rays only)
Gill rakers
on lower limb 13 - 14
on upper limb 3 - 5
total 17 - 19


Dorsal fin(s)

Fins number 2
Finlets No. Dorsal   
Spines total 7 - 7
Soft-rays total 9 - 9
Adipose fin

Caudal fin


Anal fin(s)

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

Paired fins

Pectoral Attributes  
Pelvics Attributes  
Spines     1
Soft-rays   5 - 5
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