Morphology Data of Bathygobius soporator
Identification keys
Main Ref. Harrison, I.J., P.J. Miller and F. Pezold, 2003
Appearance refers to Male; Female
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors
Remarks Males are larger than females (Ref. 123750).

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral fusiform / normal
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales

Diagnosis: body with 3 broad, oblique, dark cross bars; numerous pale striae along sides, corresponding to the center of each longitudinal scale row; head and pectoral-fin bases with white spots and mottling; predorsal scales extend well anterior to level of preoperculum, and anterior margin of scaled area appears convex in dorsal view (Ref. 57403, 79590). 4-5 outer/upper pectoral-fin rays free (Ref. 57403, 79590), hence its name "Frillfin goby" (Ref. 26938). Body shape is terete, slightly depressed; eyes situated dorso-laterally; reduced swim bladders (Ref. 92840).

Description: predorsal scales extending anteriorly beyond level of preopercle, towards rear edge of orbit, with anterior margin of scaled area convex in dorsal view (Ref. 79590). 16-27 (usually 18-24) predorsal scales; 33-40 (usually 36 or 37) scales in a longitudinal series (including 3-5 scales on caudal fin base), 12-14 (usually 13) scales in rearward transverse series; 1st dorsal fin: VI; 2nd dorsal fin: I,8-9; anal fin I,7-9 (usually 8); pectoral fins: 18-21 (usually 19 or 20), 4-5 outer (dorsal) ones free; caudal fin: 14 or 15 branched rays (Ref. 57403, 79590).

Coloration: Preserved specimens: 3 broad, oblique cross bars on body, middle one often paler than others; flanks with numerous pale striae, corresponding to scale centers of each longitudinal scale row (less distinct in large individuals); head with dark mottling, including intense dark spot behind eye and a more diffuse spot above preoperculum; cheeks, operculum and pectoral-fin bases covered with pale spots; faint lateral pre- and suborbital bands present; distal area of 1st dorsal fin pale, middle part with a broad dark band; 2nd dorsal fin with dark, oblique bands, sometimes confluent, and more intense posteriorly; anal fin dark, in particular posteriorly; bases of pectoral fins with upper and lower areas dark; pelvic dark with a paler rim; caudal fin with 3-4 concentric dark bands (Ref. 57403, 79590). In life: margins of both dorsal fins pink; 1st ray of 2nd dorsal fin with 3 black spots; ventral rays of caudal fin olivaceous green; spots on body olivaceous to black (Ref. 57403, 79590).

Ease of Identification

Meristic characteristics of Bathygobius soporator

Lateral Lines Interrupted: No
Scales on lateral line 37 - 41
Pored lateral line scales
Scales in lateral series 33 - 40
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
total 9 - 11


Dorsal fin(s)

Fins number 2
Finlets No. Dorsal   0 - 0
Ventral  0 - 0
Spines total 7 - 7
Soft-rays total 8 - 9
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 7 - 9

Paired fins

Pectoral Attributes  more or less normal
Spines     0
Soft-rays   18 - 22
Pelvics Attributes  part of sucker-disc
Position    thoracic  before origin of D1
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Garilao, Cristina V.
Modified by Musschoot, Tobias
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