Evidence for genetic differentiation of Octopus vulgaris (Mollusca, Cephalopoda) fishery populations from the southern coast of Brazil as revealed by microsatellites

► Octopus vulgaris is a cephalopod species found among several oceans. ► Microsatellites for population structure evaluation. ► Four genetic fishery stocks are found along the Southern Atlantic coast. ► Implications for conservation and sustainable management of octopuses.