Morphology Data of Monocentris japonica
Identification keys
Abnormalities
Main Ref. Masuda, H., K. Amaoka, C. Araga, T. Uyeno and T. Yoshino, 1984
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs no special organs
Different appearance males alike females
Different colors males alike females
Remarks

Descriptive characteristics of juvenile and adult

Striking features light organs
Body shape lateral short and / or deep
Cross section compressed
Dorsal head profile clearly convex
Type of eyes more or less normal
Type of mouth/snout more or less normal
Position of mouth sub-terminal/inferior
Type of scales cycloid scales
Diagnosis

Body except for caudal peduncle armored with huge, immovable scales. Lateral line scales present but without opening. Dorsal fin spines large, without membrane. Pelvic fin spine large, with locking mechanism. Anal fin without spine. Body yellow, scales outlined in black; lower jaw black. There is a pair of light organs each side of chin.

Ease of Identification

Meristic characteristics of Monocentris japonica

Lateral Lines 1 Interrupted: No
Scales on lateral line 13 - 16
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 6 - 8
on upper limb 12 - 15
total 18 - 23
Vertebrae
preanal
total

Fins

Dorsal fin(s)

Attributes other
Fins number 2
Finlets No. Dorsal   0 - 0
Ventral  0 - 0
Spines total 5 - 6
Soft-rays total 11 - 12
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 9 - 11

Paired fins

Pectoral Attributes  more or less normal
Spines     0
Soft-rays   13 - 15
Pelvics Attributes  largely reduced to one ray
Position    thoracic  beneath origin of D1
Spines     1
Soft-rays   2 - 3
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Froese, Rainer
Modified by Froese, Rainer
Comments & Corrections
Sign our Guest Book
Back to Search
cfm script by eagbayani, 17.10.00, php script by rolavides, 13/03/08 ,  last modified by sortiz, 06.27.17