Morphology Data of Helcogramma lacuna
Identification keys
Main Ref. Allen, G.R. and M.V. Erdmann, 2012
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
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales

Description: Dorsal rays III +XIII- XIV + 10-11, 1-2 free pterygiophores; anal fin I, 20; pectoral rays 16-17 (usually 1+9+7); pelvic fin I,2; caudal rays 13, branched 9, procurrent 9 each in both dorsal and ventral. Vertebrae 11+ 26; last pleural and epipleural ribs on 11th vertebral centrum. Lateral line continuous, pored scales 21-27 (usually 25); scales ctenoid; largest (twice in size) at the area posterior to pectoral-fin base and below the lateral line; head, nape, belly, and pectoral-fin base scaleless. Mandibular sensory pores 5-12 + 5-10 + 5-12 (usually 9+5+8); orbital cirri minute (Ref. 52308, 90102). Male overall dusky, head darker ventrally, body with 7-8 bars, irregular and faint; female tan to dusky brown with bars more faint (Ref. 90102).

Ease of Identification

Meristic characteristics of Helcogramma lacuna

Lateral Lines Interrupted: No
Scales on lateral line
Pored lateral line scales 21 - 27
Scales in lateral series
Scale rows above lateral line
Scale rows below lateral line
Scales around caudal peduncle
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
preanal 11 - 11
total 37 - 37


Dorsal fin(s)

Fins number 3
Finlets No. Dorsal   
Spines total 16 - 17
Soft-rays total 10 - 11
Adipose fin

Caudal fin


Anal fin(s)

Fins number 1
Spines total 1 - 1
Soft-rays total 20 - 20

Paired fins

Pectoral Attributes  
Soft-rays   16 - 17
Pelvics Attributes  
Spines     1
Soft-rays   2 - 2
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Olisa, Kristine Elaine Paz
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