The Gaiola is a large motor vessel for river transport in the Amazon River. Originally they were steamboats very similar to those in the Mississipi River. The vessels may have capacity for 300 passengers and 600 tons with about 4 m draft. The Gaiola is made from local timber, where the comfort is minimal and passengers sleep in hammocks on deck, which led to the name Gaiola (“cage”). An old text describing the vessel: “The Gaiola is a typical ship of the Amazon, mixed for passengers and cargo. They are seen up and down the rivers always crowded with passengers who set their hammocks in any part, among the cattle, pigs, chicken and birds!”