NOVELTY - The device has a concave surface arranged opposite mean water wave direction. A convex surface is placed opposite the concave surface. The surfaces are rotated about a vertical axis of symmetry of the device to extract power from crest and trough of wave. The convex surface has cross-sectional profile that additionally extends to a pointed paddle tip (2) at the vertical axis of symmetry of the device, where the cross-sectional profile is formed with Gaussian profile (4). An attachment point is attached to a wave energy conversion apparatus.    USE - Paddle device for use with a wave energy conversion apparatus for extracting and converting wave energy into mechanical motion from crest and trough of water waves in oceans.    ADVANTAGE - The cross- sectional profile of the convex surface extends to the pointed paddle tip at the vertical axis of symmetry of the device, so that the device is provided with hydrodynamically efficient profile and reduces dynamic pressure on a lee surface, thus reducing energy dissipation and increasing energy collection, and hence improving power extraction over a symmetrically shaped device or paddle. The wave energy conversion apparatus can be operated efficiently according to strength of sensed wave conditions such that the paddle can be withdrawn away from a water surface and a most active part of the wave to prevent damage to the wave energy conversion apparatus in extreme circumstances. The pointed paddle tip is formed in blunt shape with a cross-section similar to an aerofoil with a neutral lift so as to ensure clean separation of flow into and around the paddle. The convex surface is optionally provided with the Gaussian profile to improve hydrodynamics and strength of the device.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for operating a wave energy conversion apparatus.    DESCRIPTION OF DRAWING(S) - The drawing shows a side elevation view of a wave paddle.    Straight edge (1)    Pointed paddle tip (2)    Gaussian profile (4)    Internal volume (5)    Paddle faces (11, 12)    Seal (14)    Base device (15)    Hydraulic rams (16)