Fishing Boats are civilian vessels used for fishing for food and can also whale coin for an unlimited amount in Age of Empires III. Fishing Boats can be built immediately in the Dock at the beginning of the game for a price of 100 Wood.
Fishing Boats are similar to the Fishing Boat in the first Age of Empires game, though, they has much higher hit points. It can also garrison units inside it (by the use of the garrison button, not by just right clicking it).
Although it has no offensive or defensive capabilities whatsoever, it can be garrisoned inside the Dock which can deal damage to enemies within its range.
"Fishing was a huge industry in northeastern North America, where poor soil did not readily support extensive agriculture. Fish and shellfish were abundant in the waters of the Atlantic and in time a thriving industry of fishing, whaling and shipbuilding developed. The Gloucester Schooner was a long, sleek, two-masted fishing vessel first constructed in 1713 in Gloucester, Massachusetts. These ships plied the waters of the Atlantic for cod, halibut, and mackerel, sometimes salting their catches at sea or, when close to the coast, bringing them in fresh."