Duffichthys
| Duffichthys Temporal range: Late Devonian | |
|---|---|
| Scientific classification | |
| Domain: | Eukaryota | 
| Kingdom: | Animalia | 
| Phylum: | Chordata | 
| Clade: | Sarcopterygii | 
| Order: | †Porolepiformes | 
| Genus: | †Duffichthys Ahlberg, 1992 | 
| Type species | |
| †Duffichthys mirabilis Ahlberg, 1992 | |
Duffichthys is a genus of prehistoric lobe-finned fish which lived during the Late Devonian period. Fossils have been found at the locality of Scat Craig, Scotland.