The mean time to induce tonic immobility in smooth dogfish was 32.5 seconds. The mating season of smooth dogfish is from May to June. Smooth dogfish are relatively small and slender. Commercial fisheries have had an increased interest in smooth dogfish since the 1900s. Squaliformes is an order of sharks that includes the smooth dogfish and spiny dogfish. In smooth dogfish, tooth replacement is related to body growth. Smooth dogfish have the ability to change colors using melanophores to help them camouflage. Smooth dogfish have a relatively low population doubling time of 4.5 to 14 years. Smooth dogfish differ from other sharks because of their 10 rows of flat, blunt teeth. Smooth dogfish also eat squid, worms, small fish, razor clams, and occasionally garbage.