| Ref Utama. | Trewavas, E., 1983 |
| Penampilan mengacu pada | Laki-laki; Betina |
| Bones in OsteoBase |
| Organ khusus | no special organs |
| Penampilan berbeda | males alike females |
| Warna yang berbeda | males alike females |
| Keterangan |
| Fitur yang mencolok | none |
| Bentuk tubuh lateral (shape guide) | short and / or deep |
| Penampang melintang | compressed |
| Profil kepala bagian dorsal | more or less straight |
| Jenis mata | more or less normal |
| Jenis mulut/moncong | more or less normal |
| Posisi mulut | terminal |
| Jenis timbangan | cycloid scales |
| diagnosa |
All the populations dark in color with melanic patches on lower parts of head and pectoral region. Head and back are dark purple. Lower pharyngeal bone less robust, with lateral lobes of toothed area narrow. |
| Kemudahan Identifikasi |
| Garis Lateral | 2 Terganggu: No |
| Sisik pada garis lateral | 30 - 31 |
| Sisik garis lateral berpori-pori | |
| Timbangan dalam seri lateral | |
| Baris skala di atas garis lateral | |
| Baris skala di bawah garis lateral | |
| Sisik di sekitar tangkai ekor | |
| Barbel | 0 |
| Celah insang (hanya hiu/pari) | absent |
| Pengangkat insang | |
| pada tungkai bawah | 19 - 21 |
| pada tungkai atas | 2 - 2 |
| Keseluruhan (total) | 22 - 22 |
| vertebrata, bertulang belakang | |
| preanal | |
| Keseluruhan (total) | 30 - 28 |
| Atribut | extending over most of the back length |
| Nomor sirip | 1 |
| No. | Dorsal 0 |
| Ventral 0 | |
| Total duri | 15 - 17 |
| Total sinar lembut | 12 - 13 |
| Sirip adiposa | absent |
| Atribut | more or less truncate; more or less normal |
| Nomor sirip | 1 |
| Total duri | 3 - 3 |
| Total sinar lembut | 9 - 11 |
| Dada | Atribut more or less normal |
| Duri | |
| Sinar lembut | |
| Panggul | Atribut more or less normal |
| Posisi thoracic beneath origin of D1 | |
| Duri | |
| Sinar lembut |