Morphology Data of Bathygobius casamancus
Identification keys
Main Ref. Harrison, I.J., P.J. Miller and F. Pezold, 2003
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 elongated
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth terminal
Type of scales

Diagnosis: body with 3 longitudinal dark bands, no pale striae along sides; head and bases of pectoral fins without pale spots; predorsal scales extend anteriorly to level of preoperculum or only just anterior to this, and the anterior margin of scaled area weakly emarginate in dorsal view; 3-4 outer/upper free pectoral-fin rays (Ref. 57403, 79590).

Description: 14-21 (usually 17 or 18) predorsal scales; 34-39 (usually 36 or 37) scales in longitudinal series (including usually 2 scales on caudal fin base), 12 or 13 in rearward transverse series; 1st dorsal fin: VI; 2nd dorsal fin: I,9-11 (usually 10); anal fin: I,8-10 (usually 9); pectoral fins: 17-19 (usually 18), the 3-4 outer (dorsal) ones free; caudal fin: 14 or 15 branched rays (Ref. 57403, 79590).

Coloration: 3 longitudinal dark bands on body: lower one along the mid-lateral line, intermediate band along dorso-lateral part of flank, continuing anteriorly along the oculo-scapular groove (above dorsal margin of opercle and preopercle), and upper band fainter, running along bases of dorsal fins and continuing forward on nape; faint longitudinal bands running from posterior border of eye to toward mid- and upper part of preoperculum, meeting dark spot on mid part of operculum, and fainter spot on upper part of operculum; dark suborbital band from corner of mouth to midway along cheek, level with posterior part of iris; lower jaw with pale spots; broad dark spot on upper margin of pectoral-fin base, posterior to upper corner of operculum; upper and lower margins of pectoral-fin bases with narrow longitudinal bands; dorsal fins each with a narrow, dark longitudinal band at base; 2nd dorsal fin speckled on mid and dorsal parts of fin, but with a pale distal margin; anal fin dark on distal parts, but with a pale margin; pelvic fins dark; caudal fin with dorsal and ventral areas dark and a short oblique line on upper part of base (Ref. 57403, 79590).

Ease of Identification

Meristic characteristics of Bathygobius casamancus

Lateral Lines Interrupted: No
Scales on lateral line
Pored lateral line scales
Scales in lateral series 34 - 39
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
on upper limb


Dorsal fin(s)

Fins number 2
Finlets No. Dorsal   0
Ventral  0
Spines total 7 - 7
Soft-rays total 9 - 11
Adipose fin absent

Caudal fin

Attributes more or less truncate; more or less normal

Anal fin(s)

Fins number 1
Spines total 1 - 1
Soft-rays total 8 - 10

Paired fins

Pectoral Attributes  more or less normal
Spines     0
Soft-rays   17 - 19
Pelvics Attributes  part of sucker-disc
Position    thoracic  before origin of D1
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Musschoot, Tobias
Modified by Musschoot, Tobias
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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