Morphology Data of Ratabulus megacephalus
Identification keys
Main Ref. Imamura, H. and M.F. Gomon, 2010
Appearance refers to Male; Female
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

This species is distinguished by the following characters: 94-112 anteroventrally slanted oblique scale rows above lateral line; snout length 31.2-35.7% HL, markedly decreasing in length proportionally with growth; pectoral fin length 13.9-17.0% SL; pelvic fin length 19.5-23.1% SL; nasal bone without tubercles; dorsal surface of head and body dark brown, with small, round, dark-brown spots; and pelvic fin with small brown to black spots (Ref. 86254).

Ease of Identification

Meristic characteristics of Ratabulus megacephalus

Lateral Lines 1 Interrupted: No
Scales on lateral line 53 - 55
Pored lateral line scales
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 6 - 8
on upper limb 1 - 1
total 7 - 9


Dorsal fin(s)

Fins number 2
Finlets No. Dorsal   0 - 0
Ventral  0 - 0
Spines total 10 - 10
Soft-rays total 11 - 12
Adipose fin absent

Caudal fin


Anal fin(s)

Fins number 1
Spines total 0 - 0
Soft-rays total 12 - 12

Paired fins

Pectoral Attributes  
Spines     0
Soft-rays   19 - 20
Pelvics Attributes  
Spines     1
Soft-rays   5 - 5
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Binohlan, Crispina B.
Modified by Capuli, Estelita Emily
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cfm script by eagbayani, 17.10.00, php script by rolavides, 13/03/08 ,  last modified by sortiz, 06.27.17