Thornback

Thornback may refer to:

Fish

• Thornback guitarfish (Platyrhinoidis triseriata), a species of ray in the north-eastern Pacific Ocean
• Thornback ray (Raja clavata), also known as the Thorback skate, a species of ray in the Atlantic Ocean
• Thornback skate (Dentiraja lemprieri), a fish endemic to Australia

Other

• USS Thornback (SS-418), a submarine
• Phaerimm, a fictional species of creatures in Dungeons & Dragons
• Spinster