Morphology Data of Brachysomophis crocodilinus
Identification keys
Main Ref. McCosker, J.E. and J.E. Randall, 2001
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 eel-like
Cross section circular
Dorsal head profile more or less straight
Type of eyes more or less normal
Type of mouth/snout
Position of mouth terminal
Type of scales

Dorsal fin arising well behind pectoral tips; pectoral fins teardrop-shaped; snout very short; jaws elongate; anterior nostril in a very short tube in upper lip, closely followed by an ethmoidal pore, a barbel, and the posterior nostril which is in outer lip and entirely covered by a flap; labial cirri numerous, unbranched and slender in anterior half of lip of mandible, those posterior and along lower lip branched at tips; flesh above and behind eye laterally elevated as a ridge; dorsal head profile notably incised and medially constricted behind eyes, the flesh forming a narrow transverse ridge behind dorsal margin of eyes; head pores and lateral-line pores apparent; free sensory neuromasts visible as rows of small white spots on nape; teeth conical (Ref. 42180). Lateral-line pores and temporal pores typically in dark spots; smaller dark spots present irregularly on flank between lateral line and dorsal fin of larger specimens (Ref. 42180); brownish, lighter below and on fins (Ref. 3972). Eye small, colored like the head, and placed towards the front of the long mouth (Ref. 48635).

Description: Characterized by head length 6.5-8.0 in TL; depth of body 16-25 in TL; short snout, 13.0-19.0 in head length; tail length equal to or less than body length (head and trunk); numerous close-set cirri on side of jaws; upper jaw with two rows of teeth; lower jaw with well-spaced canines; largest canines in single row on intermaxilla and vomer (Ref. 90102).

Ease of Identification

Meristic characteristics of Brachysomophis crocodilinus

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
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
preanal 53 - 63
total 116 - 124


Dorsal fin(s)

Fins number 1
Finlets No. Dorsal   
Spines total
Soft-rays total
Adipose fin absent

Caudal fin

Attributes pointed

Anal fin(s)

Fins number
Spines total
Soft-rays total

Paired fins

Pectoral Attributes  other (see remarks)
Pelvics Attributes  
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Garilao, Cristina V.
Modified by Valdestamon, Roxanne Rei
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