Morphology Data of Gerres mozambiquensis
Identification keys
Abnormalities
Main Ref. Iwatsuki, Y. and P.C. Heemstra, 2007
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
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

Diagnosis: A species of Gerres with the following combination of characters: body depth 46-47% of standard length, distinctly more than head length; dorsal fin with 9 spines and 10 soft rays; anal fin with 3 spines and 7 soft rays; pored lateral-line scales 43-44; 4-4.5 scales between fifth dorsal-fin spine base and lateral line; 5.5-6.5 scales above lateral line, 9.5-10.5 below; scales on dorsum of head extend to or slightly beyond vertical at front edge of orbit, without two converging rows of minute scales within larger scales, premaxillary groove at front of interorbital area not scaly; gill rakers on first gill arch 12-13; second dorsal-fin spine longest, its length about twice orbit diameter; second anal-fin spine robust, ratio of greatest width of second spine to greatest width of third spine 1.7-1.8; margin of inter-spinous membranes of second to fifth dorsal-fin spines black; caudal fin lobes short, length of upper lobe equal to head length; body with six to eight indistinct dark vertical bars, bar width about half pupil diameter; supraneural bones three (Ref. 75744).

Description: Body deep, compressed; rostro-occipital profile of head almost straight; predorsal length clearly less than body depth (Ref. 75744). Orbit diameter 2.4-2.7 times in head length, slightly greater than bony interorbital width; snout length less than orbit diameter; maxilla reaching to vertical at front margin of eye; mandibular profile weakly concave; preopercle edge smooth, rounded angle slightly less than 90° (Ref. 75744). Dorsal fin with 9 spines and 10 soft rays; anal fin with 3 spines and 7 soft rays; pectoral fin with 15-16 rays, its length clearly greater than head length, fin tip reaching between verticals at anus and anal-fin origin; pelvic fins reach anus (Ref. 75744). Head and body scales cycloid; pored lateral-line scales 43-44, 5.5-6.5 scales above lateral line, 9.5-10.5 scales below lateral line; no scales on preopercle flange (Ref. 75744). Gill rakers short, rakers of upper series shorter than lower rakers, anteriormost raker of lower series usually longer than uppermost raker (Ref. 75744).

Colouration: Head and body buff dorsally, becoming tinged with silver ventrally; fins hyaline except for blackish margin on front half of spinous dorsal fin; inner margin of caudal-fin lobes slightly darkened (Ref. 75744).

Ease of Identification

Meristic characteristics of Gerres mozambiquensis

Lateral Lines Interrupted: No
Scales on lateral line
Pored lateral line scales 43 - 44
Scales in lateral series
Scale rows above lateral line 5.5 - 6.5
Scale rows below lateral line 9.5 - 10.5
Scales around caudal peduncle
Barbels
Gill clefts (sharks/rays only)
Gill rakers
on lower limb 8 - 8
on upper limb 4 - 5
total 12 - 13
Vertebrae
preanal
total

Fins

Dorsal fin(s)

Attributes no striking attributes
Fins number 1
Finlets No. Dorsal   
Ventral  
Spines total 9 - 9
Soft-rays total 10 - 10
Adipose fin absent

Caudal fin

Attributes forked; more or less normal

Anal fin(s)

Fins number 1
Spines total 3 - 3
Soft-rays total 7 - 7

Paired fins

Pectoral Attributes  more or less normal
Spines     
Soft-rays   15 - 16
Pelvics Attributes  more or less normal
Position    
Spines     
Soft-rays   
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