| Main Ref. | Desoutter, M., 2003 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | flatfish |
| Body shape lateral | short and / or deep |
| Cross section | flattened |
| Dorsal head profile | clearly convex |
| Type of eyes | other (see Diagnosis) |
| Type of mouth/snout | other (see Diagnosis) |
| Position of mouth | sub-terminal/inferior |
| Type of scales | |
| Diagnosis |
Diagnosis: flat and asymmetric body; eyes located on right side of head, except in reversed individuals; preopercle covered with scales, but still visible (shining through the scales) (Ref. 57416). No scales on opercle (Ref. 80029). Mouth small, more or less arched and inferior; dorsal and anal fins lacking spinous rays and united by membrane to caudal fin which is well defined; pectoral fins present on both sides, but reduced ; pelvic fins well separate from each other, with single ray; only straight part of lateral line visible; body covered with ctenoid scales (Ref. 57416). Description: 10 (Ref. 57416- or 12 (Ref. 80029) caudal-fin rays. Colouration: eyed side brown, with a row of rounded, dark spots and dots irregularly scattered over entire body and caudal fin; vertically elongate spots at bases of dorsal and anal fins; blind side beige (Ref. 57416). |
| Ease of Identification |
| Lateral Lines | 1 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 | 25 - 28 |
| Attributes | extending over most of the back length |
| Fins number | 1 |
| Finlets No. | Dorsal 0 - 0 |
| Ventral 0 - 0 | |
| Spines total | 0 - 0 |
| Soft-rays total | 46 - 51 |
| Adipose fin | absent |
| Attributes | more or less truncate; confluent |
| Fins number | 1 |
| Spines total | 0 - 0 |
| Soft-rays total | 34 - 36 |
| Pectoral | Attributes other (see Diagnosis) |
| Spines | |
| Soft-rays | |
| Pelvics | Attributes other (see Diagnosis) |
| Position jugular behind origin of D1 | |
| Spines | |
| Soft-rays 1 - 1 |