The invention relates to a method which allows identifying shellfish by forming a mark (6) on the carapace or shell of the animal (5) to be identified by means of applying a laser beam (4). By means of this method it is possible to identify crustaceans, mollusks or any other animal provided with a carapace, shell or outer skeleton. A logotype or trademark, an expiry date, capture date, a bar code or any other legend can thus be marked on the surface of the shell or of the carapace of the animal to be identified. Said mark is indelible, resistant to cooking, freezing or washing. The identification by the present method can he carried out on the wet or dry, alive or frozen, fresh or already cooked animal without the quality of the identification mark being altered. This method does not require special inks or additives and can be used to directly mark very rough carapaces or shells as in the case of lobsters, spider crabs or scallops.
