Guy Takayama Surfboard Fins enhance the performance of your surfing and are designed to improve control, and increase liveliness in your board. As one of the first to adopt such a radical fin shape, it took a while before Guy's progressive surfboard fin designs caught on in the surfboard community. But once surfers experience the maneuverability and response that fins such as the Manta and Orca center fins offer, it's hard to go back.