Morphology Data of Enneacampus ansorgii
Identification keys
Main Ref. Breder, C.M. and D.E. Rosen, 1966
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs other
Different appearance always different morphology between mature adults
Different colors
Remarks Males with brood pouch; females with ovipositor (Ref. 205).

Descriptive characteristics of juvenile and adult

Striking features striking shape of body
Body shape lateral eel-like
Cross section
Dorsal head profile
Type of eyes more or less normal
Type of mouth/snout tube-like
Position of mouth terminal
Type of scales

Diagnosis: 11-15 (median 13) pectoral fin rays; head length 8.4-10.8 (mean 9.4) times in SL (Ref. 57226, 81680). Snout tubular, relatively short (Ref. 57226), ratio head length/snouth length 2.0-2.8 (mean 2.5)(Ref. 57226, 81680).

Description: total number of rings 44-50 (Ref. 81680), 12-13 trunk rings and 31-37 tail rings (Ref. 57226, 81680). 5.0-6.5 subdorsal rings; dorsal fin origin from middle of last trunk ring to origin of second tail ring, usually at anterior margin of first tail ring; snout length positively allometric (Ref. 81680). Male brood pouch extending onto 12-17 rings of the tail; caudal fin with 9 rays (Ref. 57226, 81680). Dorsal-fin origin above anal fin, either on last ring of trunk or on first ring of tail (Ref. 57226).

Coloration: colour pattern with a complex pattern of bars and blotches, with, as far as can be judged from preserved specimens, considerable intraspecific variation, but it is unclear which variation is due to sex and/or sexual maturity (Ref. 81680). Belly brown to red-brown, with pale greenish to grey blotches; ventral part of head whitish or light brown; tail and lateral part of body with a pattern of alternating dark and light brown or whitish bars and blotches; this pattern continues onto dorsum in some specimens; in others, dorsum uniformly dark brown; snout sometimes with alternating dark brown/light brown to whitish bar pattern; opercle with fine white-green iridescent lines; dark and light bars radiate from eye; distal part of dorsal fin hyaline and proximal third or more of each dorsal fin ray shaded with brown; proximal third of pectoral fin blotched or shaded with brown, otherwise hyaline; caudal fin with irregular brown blotches, margin usually pale (Ref. 81680). Back and lower sides with irregular diffuse bars occurring every 4 or 5 rings; rectangular brown spot on every ring and on ventral surface of body; light brown irregular spots on sides of trunk and tail; caudal fin marked with irregular spots (Ref. 57226).

Ease of Identification

Meristic characteristics of Enneacampus ansorgii

Lateral Lines Interrupted: No
Scales on lateral line
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
on upper limb


Dorsal fin(s)

Attributes no striking attributes
Fins number 1
Finlets No. Dorsal   
Spines total 0 - 0
Soft-rays total 22 - 29
Adipose fin absent

Caudal fin

Attributes more or less truncate; more or less normal

Anal fin(s)

Fins number 1
Spines total 0 - 0
Soft-rays total 2 - 3

Paired fins

Pectoral Attributes  more or less normal
Spines     0
Soft-rays   11 - 15
Pelvics Attributes  suppressed/absent
Position    absent
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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