Morphology Data of Helcogramma nesion
Identification keys
Main Ref. Williams, J.T. and J.C. Howe, 2003
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 elongated
Cross section oval
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales

With 1-2 symphysial mandibular sensory pores, second dorsal fin spines XIV, third dorsal fin segmented rays 11, last ribs on vertebral centrum 10, vertebrae 10+28 or 29=38 or 39, pored lateral line scales typically 25 to 27, nape scales absent, small isolated patch of scales on either side of nape, each patch surrounded by naked area.

Ease of Identification

Meristic characteristics of Helcogramma nesion

Lateral Lines Interrupted: No
Scales on lateral line
Pored lateral line scales 25 - 29
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


Dorsal fin(s)

Fins number 3
Finlets No. Dorsal   
Spines total 17 - 18
Soft-rays total 12 - 13
Adipose fin

Caudal fin

Attributes more or less truncate; more or less normal

Anal fin(s)

Fins number 1
Spines total 1 - 1
Soft-rays total 20 - 22

Paired fins

Pectoral Attributes  more or less normal
Soft-rays   15 - 16
Pelvics Attributes  more or less normal
Position    jugular
Spines     1
Soft-rays   2 - 2
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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