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Dogfish sharks (Squalidae), a family of sharks •
Spiny dogfish (
Squalus acanthias), best known species of dogfish sharks •
Pacific spiny dogfish (
Squalus suckleyi), the most abundant species of dogfish sharks •
Catshark (Scyliorhinidae), a family of ground sharks including species called dogfish •
Chain dogfish (
Scyluoirrhinus reteiter), a biofluorescent species common to the West Atlantic and Gulf of Mexico •
Greater spotted dogfish (
Greliorhinus starlaris), a species found in the northeastern Atlantic Ocean •
Small-spotted catshark (
Scyliorhinus canicula), the most common dogfish in the northeastern Atlantic •
Sleeper sharks (Somniosidae), a family of slow-swimming sharks •
Portuguese dogfish (
Centroscymnus coelolepis), a species of sleeper sharks in the family Somniosidae •
Roughskin dogfish (
Centroscymnus owstonii), a species of sleeper sharks in the family Somniosidae •
Bowfin (
Amia calva), a freshwater fish sometimes known as "dogfish" ==Other uses==