De acuerdo al historiador romano de la época Suetonio, el emperador Calígula le declaró la guerra a Neptuno, dios romano del mar, y envió al a tripulación a recolectar conchas como botín de guerra.
Gaius Suetonius Tranquillus. 1973: 172. Citado en Social justice, Volumen 25, 1998 http://books.google.cl/books?id=ni4uAQAAIAAJ&q=Neptune "XLVI. At last, as if resolved to make war in earnest, he drew up his army upon the shore of the ocean, with his balistae and other engines of war, and while no one could imagine what he intended to do, on a sudden commanded them to gather up the sea shells, and fill their helmets, and the folds of their dress with them, calling them 'the spoils of the ocean due to the Capitol and the Palatium'. "