Underwater propulsion system comprised of oscillating fins adapted for mounting on a scuba tank operatively connected to oscillate transversely to the longitudinal axis of the scuba tank, which fins are configured to flex within a range of angles of attack with each stroke of the drive members

oscillating fin propulsion system comprised of a pair of fins operably connected to drive handles actuatable by user applied force to sweep the fins in an oscillating motion below a water surface

Sporting articles and equipment; boards for use in water sports; fins for boards for use in water sports; surfboards; bodyboards; leashes for bodyboards; restraint straps for body boards; fins for bodyboards; swimming aids; swimming floats; swimming flippers; swimming webs