Morphology Summary - Thrissina samam
Morphology Data of Thrissina samam
Identification keys
Abnormalities
Main Ref. Hata, H., I.F. Mandagi and K.W.A. Masengi, 2023
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors
Remarks

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral  (shape guide) elongated
Cross section compressed
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

This species is distinguished by the following characters: short maxilla, 20.3-23.1% of SL, its posterior tip not reaching to posterior margin of opercle; first supramaxilla is elongated, longer than half length of second; lower jaw rather long, 18.7-21.2% of SL; abdomen with 4-8 + 8-10 = 13-16 keeled scutes; no scutes anterior to the pectoral fin; 1UGR (upper gill rakers of first gill arch) 14-16, 1LGR (lower gill rakers of first gill arch) 18-21, 1TGR (total gill rakers of first gill arch) 33-36; 2UGR 10-14, 2LGR 18-21, 2TGR 29-35; 3UGR 9-12, 3LGR 11-14, 3TGR 20-26; 4UGR 6-10, 4LGR 9-12, 4TGR 17-22; distinct black blotches on dorsal fin absent; caudal peduncle narrow, 9.0-10.6% (mean 9.7%) of SL; and long, 9.7-11.0% of SL; pre-dorsal-fin length 47.7-53.1% of SL; pre-anal-fin short, 63.2-68.3% of SL; distance between pelvic-fin insertion and anal-fin origin is rather short, 18.7-23.7% of SL; pectoral fin short, 16.9-19.1% of SL; pelvic fin short, 12.6-14.3% of SL; body elongated, 20.1-26.0% (mean 23.0%) of SL (Ref. 129422).

Ease of Identification

Meristic characteristics of Thrissina samam

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
Barbels
Gill clefts (sharks/rays only)
Gill rakers
on lower limb 18 - 21
on upper limb 14 - 16
total 33 - 36
Vertebrae
preanal
total

Fins

Dorsal fin(s)

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

Caudal fin  (shape guide)

Attributes

Anal fin(s)

Fins number
Spines total
Soft-rays total

Paired fins

Pectoral Attributes  
Spines     
Soft-rays   
Pelvics Attributes  
Position    
Spines     
Soft-rays   
(e.g. 9948)
(e.g. oophagy)
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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