The maritime industries of Taiwan are a large part of Taiwan's economy. Industries of particular importance are shipbuilding, boat building, maritime transport, aquaculture, mariculture, commercial fishing, seafood processing, offshore wind power and various forms of tourism. Deep sea mining, especially of dormant hydrothermal vents, is also being considered for the future. In 2018 Taiwan was the fourth largest yacht building nation. Taiwan is home to a number of maritime museums and maritime colleges.