Sailfin roughshark
Oxynotus paradoxus
- Vulnerable
- Card rarity: Rare
- Sharks and rays

The sailfin roughshark is a species of dogfish shark in the family Oxynotidae, found in the eastern North Atlantic from Scotland to Senegal between latitudes 61°N and 11°N, at depths of between 265 and 720 m. Its length is up to 1.2 m.
Classification
- Class
- Chondrichthyes
- Order
- Squaliformes
- Family
- Oxynotidae
- Genus
- Oxynotus