The Lagunari (from the Italian "laguna" = lagoon) are amphibious troops of the Italian Army. Today's Lagunari regiment Serenissima has its headquarters in Mestre, a borough of Venice, and is subordinate to the Pozzuolo del Friuli Cavalry Brigade .
In the image you can also see 3 AAV-7
http://www.esercito.difesa.it/root/unita_sez/unita_ftrlag_serenissima.asp