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A watercraft having a changeable hull structure. More particularly, a watercraft having a first subassembly and one or more second subassemblies. The first subassembly includes a sponson, a flooring, and a transom, the one or more second subassemblies, each being a replaceable hull structure. The first subassembly and each of the one or more second subassemblies have commensurate shapes allowing for attachment and/or replacement of the one or more replaceable hull structures. The watercraft also includes one or more elongated connectors are used to attach the first and second subassemblies.