Fusion Marine Boat Builders (FMB) is a renowned boat manufacturing company with over 50 years of experience in boat building, founded and led by Denis and Stu Bettany. Operating under Fusion Marine Ltd, which is a division of DW Bettany Boat Builders, the company is located on the Weiti River in Silverdale, Auckland, New Zealand. Fusion Marine offers innovative boatbuilding solutions and expert craftsmanship, specializing in custom boat builds, refits, and repairs.

The company operates a boatbuilding and haulout yard providing slipway access, haulout, hardstand, covered workspaces, and launching facilities. Their expertise ranges from traditional wooden boat construction to advanced carbon composite builds. Stu Bettany brings additional high-performance sailing knowledge through experience with Volvo Ocean Race yachts, America's Cup contenders, and cutting-edge foiling designs.

Fusion Marine is distinguished by its high standards of craftsmanship and commitment to quality. The company has produced cutting-edge vessels such as a full-carbon 10.5m race yacht designed by Rob Shaw and a high-speed 11.5m RIB designed for high-performance stability and maneuverability. The fusion of traditional skills and modern technology positions Fusion Marine as a leader in custom boat manufacturing in New Zealand.