Abstract: A marine wave energy converter is described, comprising a flexible spine (1) and a plurality of blades (2) rotatably mounted on and supported by the spine. Each blade is operable, by ocean waves travelling parallel to the longitudinal axis of the spine, to angularly oscillate and thereby to drive the conversion of marine wave energy into useful work, such as into electrical energy. The spine (1) is resiliently flexible and comprises one or more elongate structural elements (3) and a plurality of connectors (5, 6) mounted along a continuous length thereof, wherein the/each elongate structural element (3) is a conduit. Each blade (2) is hingedly secured to the spine (1) at a said connector (5), so as to rotate about a hinge axis perpendicular to the longitudinal axis of the spine.