S'Argamassa Roman Fish Farm can be found 2.8 miles (4.5 km)[1] eastwards along the coast from the town of Santa Eulària des Riu on the Spanish island of Ibiza.

[3] The island was granted confederate status within the Roman Empire and was known as Ebusus Federatae Civitae[4] (Federation city of Ibiza).

This used a labyrinth of nets and approximately fifty boats which channelled huge schools of fish, tuna being the main catch, into a holding area.

Garum was the clear liquid that formed on the top, drawn off by means of a fine strainer inserted into the fermenting vessel.

[6] At the end of the run of the aqueduct close to the shoreline there are the remains of rectangular structures which were once the fermenting tanks for the production of the garum.

On completion of the process the sauce was packed into enormous earthenware storage jars called amphoras,[7] also produced locally, and exported to all parts of the empire.