Morphology Data of Apopterygion oculus
Identification keys
Main Ref. Fricke, R., 1994
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs no special organs
Different appearance males alike females
Different colors males alike females
Remarks Males have a slightly higher first dorsal fin than females.

Descriptive characteristics of juvenile and adult

Striking features striking fins
Body shape lateral fusiform / normal
Cross section oval
Dorsal head profile clearly concave
Type of eyes more or less normal
Type of mouth/snout more or less normal
Position of mouth terminal
Type of scales ctenoid scales

19-25 pored scales in the anterior lateral line series, 16-20 notched scales in the posterior series, the second dorsal fin with an ocellate black blotch distally on 4th-6th membranes, the anal fin with about 11 dark streaks, the pelvic fin basally black, rays distally yellowish, with brown spots, and the dorsal fin spines densely covered with small spinules.

Ease of Identification likely to be confused with closely related species.

Meristic characteristics of Apopterygion oculus

Lateral Lines 2 Interrupted: No
Scales on lateral line 35 - 45
Pored lateral line scales 19 - 25
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   0 - 0
Ventral  0 - 0
Spines total 16 - 19
Soft-rays total 9 - 13
Adipose fin absent

Caudal fin

Attributes more or less truncate; more or less normal

Anal fin(s)

Fins number 1
Spines total 2 - 2
Soft-rays total 20 - 26

Paired fins

Pectoral Attributes  more or less normal
Spines     0
Soft-rays   14 - 16
Pelvics Attributes  largely reduced to one ray
Position    jugular  behind origin of D1
Spines     1
Soft-rays   2 - 2
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Froese, Rainer
Modified by Luna, Susan M.
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