Sepiola atlantica, also known as the Atlantic bobtail, is a species of bobtail squid native to the northeastern Atlantic Ocean (65ºN to 35ºN), from Iceland, the Faroe Islands and western Norway to the Moroccan coast. There is a single record of this species from the Mediterranean Sea. Both sexes of S. atlantica grow to around 21 mm (0.83 in) in mantle length. The type specimen was collected in the Bay of Biscay and is deposited at the Muséum National d'Histoire Naturelle in Paris.