| Common name | Duffy |
| Language | English |
| Type | Vernacular |
| Official trade name | No |
| Rank | 3 - (Other common name) |
| Country | Canada |
| Locality | Newfoundland |
| Ref. | Story, G.M., W.J. Kirwin and J.D.A. Widdowson, 1990 |
| Life stage | juveniles and adults |
| Sex | females and males |
| Core | morphology |
| 1st modifier | |
| 2nd modifier | |
| Remarks | refers to a cod with a blunt head also characterized as being darker than other cod and judged by most fishers to be of substandard quality |