Morphology Data of Brachyhypopomus bullocki
Identification keys
Main Ref. Sullivan, J.P., 2009
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
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth terminal

Can be distinguished by the following combination of features: elongated caudal filament reaching up to 45% TL in reproductive males; 6-11 wide, evenly spaced saddles of pigment over dorsum connecting to lateral bands; mesocoracoid bone present; large eye, 15.5-19.2% HL; short abdomen, usually with 12 pre-caudal vertebrae (range 11-13); poorly ossified third and fourth (outermost) branchiostegal rays, much enlarged distally, covering distal portions of the first two branchiostegal rays externally and contributing to bulbous appearance of opercular region (Ref. 81045).

Ease of Identification

Meristic characteristics of Brachyhypopomus bullocki

Lateral Lines Interrupted: No
Scales on lateral line
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line 11 - 11
Scale rows below lateral line 20 - 20
Scales around caudal peduncle
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
preanal 11 - 13


Dorsal fin(s)

Attributes greatly reduced or absent
Fins number
Finlets No. Dorsal   
Spines total
Soft-rays total
Adipose fin absent

Caudal fin


Anal fin(s)

Fins number
Spines total
Soft-rays total 196 - 233

Paired fins

Pectoral Attributes  
Soft-rays   11 - 14
Pelvics Attributes  
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Torres, Armi G.
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