| Main Ref. | Watson, R.E., 1991 |
| Appearance refers to | Male; Female |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks | Sexual dimorphic differences similar to those described for S. caudimaculosus. Jaw reaching under pupil to posterior edge of eye in males, jaw in females reaches under center or posterior edge of pupil (Ref. 34009). |
| Striking features | |
| Body shape lateral | fusiform / normal |
| Cross section | circular |
| Dorsal head profile | more or less straight |
| Type of eyes | more or less normal |
| Type of mouth/snout | more or less normal |
| Position of mouth | terminal |
| Type of scales | |
| Diagnosis |
Species has most elongate caudal peduncle of all Insularigobius examined, 14-17% of SL, usually 15-16%; predorsal midline usually fully scaled, usually 17-19; scales in horizontal series 49-51, usually 50-51; opercle may or may not be scaled; one to two spots present on caudal peduncle (Ref. 34009). |
| Ease of Identification |
| Lateral Lines | Interrupted: No |
| Scales on lateral line | |
| Pored lateral line scales | |
| Scales in lateral series | 49 - 51 |
| Scale rows above lateral line | |
| Scale rows below lateral line | |
| Scales around caudal peduncle | |
| Barbels | |
| Gill clefts (sharks/rays only) | |
| Gill rakers | |
| on lower limb | |
| on upper limb | |
| total | |
| Vertebrae | |
| preanal | |
| total |
| Attributes | |
| Fins number | 2 |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | 7 - 7 |
| Soft-rays total | 11 - 11 |
| Adipose fin |
| Attributes |
| Fins number | |
| Spines total | 1 - 1 |
| Soft-rays total | 11 - 12 |
| Pectoral | Attributes |
| Spines | |
| Soft-rays 15 - 15 | |
| Pelvics | Attributes |
| Position thoracic before origin of D1 | |
| Spines | |
| Soft-rays |