This protocol refers to a study having the aim to identify and test at field artificial structures suitable as collectors for common cuttlefish Sepia officinalis eggs in wild condition.During the same study, three different protocols were tested and compared. This one refers to the named 'trap' collector protocol, due to the adoption of trap structure used for fisheries.This work was supported by the project “Protection, improvement and integrated management of the sea environment and of cross-border natural resources – ECOSEA”, funded by EU Adriatic IPA Cross-border Cooperation 2007-2013 (2°ord./0236/0).