Morphology Summary - Thrissina baelama
Morphology Data of Thrissina baelama
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 no special organs
Different appearance males alike females
Different colors males alike females
Remarks

Descriptive characteristics of juvenile and adult

Striking features none
Body shape lateral  (shape guide) elongated
Cross section compressed
Dorsal head profile clearly convex
Type of eyes more or less normal
Type of mouth/snout more or less normal
Position of mouth sub-terminal/inferior
Type of scales cycloid scales
Diagnosis

This species is distinguished by the following characters: short maxilla, its posterior tip not reaching to posterior margin of the opercle; first supramaxilla elongated, longer than half length of second; abdomen is covered with 5-8 + 9-10 = 14-17 keeled scutes; scutes anterior to pectoral fin absent; 1UGR (upper gill rakers of first gill arch) 15-18, 1LGR (lower gill rakers of first gill arch) 20-23, 1TGR (total gill rakers of first gill arch) 36-40; 2UGR 12-15, 2LGR 20-23, 2TGR 33-38; 3UGR 10-13, 3LGR 12-14, 3TGR 23-27; 4UGR 9-11, 4LGR 9-12, 4TGR 18-22; no distinct black blotches on the dorsal fin; caudal peduncle is rather deep, 10.1-11.5% (mean 10.5%) of SL, and short 8.7-10.4% (usually shorter than 10%; mean 9.3%) of SL; pre-dorsal-fin is short, 48.0-50.4% of SL; snout is short, 3.9-4.8% of SL; body elongate, 23.0-26.9% (rarely 21.2%; mean 24.5%) of SL (Ref. 129422).

Ease of Identification

Meristic characteristics of Thrissina baelama

Lateral Lines Interrupted: No
Scales on lateral line 37 - 38
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line
Scale rows below lateral line
Scales around caudal peduncle
Barbels 0
Gill clefts (sharks/rays only)
Gill rakers
on lower limb 20 - 23
on upper limb 15 - 18
total 36 - 40
Vertebrae
preanal
total 39 - 40

Fins

Dorsal fin(s)

Attributes no striking attributes
Fins number 1
Finlets No. Dorsal   
Ventral  
Spines total 0 - 0
Soft-rays total 13 - 16
Adipose fin absent

Caudal fin  (shape guide)

Attributes forked; more or less normal

Anal fin(s)

Fins number 1
Spines total 0 - 0
Soft-rays total 25 - 35

Paired fins

Pectoral Attributes  more or less normal
Spines     0
Soft-rays   12 - 15
Pelvics Attributes  more or less normal
Position    abdominal  before origin of D1
Spines     0
Soft-rays   7 - 7
(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