The common cuttlefish or European common cuttlefish (Sepia officinalis) is one of the largest and best-known cuttlefish species. They are a migratory species that spend the summer and spring inshore for spawning and then move to depths of 100 to 200m during autumn and winter.[2] They grow to 49 cm in mantle length (ML) and 4 kg in weight.[3] Animals from subtropical seas are smaller and rarely exceed 30 cm in ML.[4]