| Common name | Oguro-usu-ei |
| Language | Japanese |
| Type | Vernacular |
| Official trade name | No |
| Rank | 2 - (Preferred common name (unique)) |
| Country | Japan |
| Locality | |
| Ref. | Uyeno, T., K. Matsuura and E. Fujii (eds.), 1983 |
| Life stage | juveniles and adults |
| Sex | females and males |
| Core | primary lexeme |
| 1st modifier | morphology |
| 2nd modifier | color pattern(s) |
| Remarks | 'black tail flat ray' |