Morphology Data of Polysteganus coeruleopunctatus
Identification keys
Abnormalities
Main Ref. Iwatsuki, Y. and P.C. Heemstra, 2015
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 fusiform / normal
Cross section compressed
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

This species is distinguished from its congeners by the following set of characters: scale rows above lateral line 6½; scales rows between 5th dorsal-fin spine base and lateral-line scale 5½ or 6½; pored lateral-line scales 51 or 52; suborbital depth subequal to or greater than the orbit diameter; dorsal-fin rays are reddish pink as well as similar reddish pink on upper margin dorsal-fin ray (no clear yellow or faint yellowish); body with 7 or 8 faint irregular blue spotted lines, not visible from all angles; reddish membranes on caudal-fin lobes and caudal fin with clear white lowest margin of lower caudal fin lobe; without blue iridescence on each scale of dorsal and lateral sides of whitish pink body; canines are large, both upper and lower canines on both jaws usually visible even when mouth closed; body deep 44-46% (mean 44%) of SL; anal- and pelvic- fin rays are whitish or reddish hyaline; no yellow (white) rear margin of branchiostegal rays and membrane; weak bony bulge present before and above eye, forming a low median ridge in larger specimens of over 30 cm SL; caudal fin is moderately forked (Ref. 106993).

Ease of Identification

Meristic characteristics of Polysteganus coeruleopunctatus

Lateral Lines Interrupted: No
Scales on lateral line 51 - 52
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line 6.5 - 6.5
Scale rows below lateral line 5.5 - 6.5
Scales around caudal peduncle
Barbels
Gill clefts (sharks/rays only)
Gill rakers
on lower limb 12 - 13
on upper limb 6 - 7
total 18 - 20
Vertebrae
preanal
total

Fins

Dorsal fin(s)

Attributes
Fins number 1
Finlets No. Dorsal   0 - 0
Ventral  0 - 0
Spines total 12 - 12
Soft-rays total 10 - 10
Adipose fin absent

Caudal fin

Attributes

Anal fin(s)

Fins number 1
Spines total 3 - 3
Soft-rays total 8 - 8

Paired fins

Pectoral Attributes  
Spines     0
Soft-rays   15 - 16
Pelvics Attributes  
Position    
Spines     1
Soft-rays   5 - 5
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