| Main Ref. | Gibbs, R.H. Jr., T.A. Clarke and J.R. Gomon, 1983 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral | elongated |
| Cross section | compressed |
| Dorsal head profile | |
| Type of eyes | more or less normal |
| Type of mouth/snout | clearly protrusible |
| Position of mouth | |
| Type of scales | |
| Diagnosis |
Two terminal bulbs separated by a long interspace (usually 2-3 times length of distal bulb, but up to 7.5 times in some small specimens). Barbel 60-85% SL in over 10 cm specimens. Terminal filament long, rarely with 1 or 2 short branches. Distal bulb usually 1-1.6 times length of proximal bulb (0.5-2 times in small specimens). Axis of stem pigmented, usually dark. External chevron-shaped or striated areas on stem usually pigmented in specimens larger than 8 cm. Paired dorsal spots between occiput and dorsal-fin origin usually 9, sometimes 7 (Ref. 11333). |
| Ease of Identification |
| 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 | |
| Barbels | |
| Gill clefts (sharks/rays only) | |
| Gill rakers | |
| on lower limb | |
| on upper limb | |
| total | |
| Vertebrae | |
| preanal | |
| total |
| Attributes | |
| Fins number | |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | |
| Soft-rays total | 22 - 25 |
| Adipose fin |
| Attributes |
| Fins number | |
| Spines total | |
| Soft-rays total | 35 - 42 |
| Pectoral | Attributes |
| Spines | |
| Soft-rays 3 - 3 | |
| Pelvics | Attributes |
| Position | |
| Spines | |
| Soft-rays 7 - 7 |