| Common Name | Placid crayfish |
| Language | English |
| Type | Vernacular |
| Official Trade Name | No |
| Rank | 3 - (Other common name) |
| Country | United States (contiguous states) |
| Locality | |
| Ref. | Bisby, F.A., M.A. Ruggiero, K.L. Wilson, M. Cachuela-Palacio, S.W. Kimani, Y.R. Roskov, A. Soulier-Perkins and J. van Hertum, 2005 |
| Life Stage | juveniles and adults |
| Sex | |
| Core | non-fish animal |
| 1st Modifier | morphology |
| 2nd Modifier | |
| Remarks | 'crayfish', i.e., from Old French 'crevice', i.e., 'small, freshwater lobster'. |