Abstract: An offshore barrier module which is adapted to retard the wave induced erosion of an adjacent shoreline includes a porous barrier member for retarding the flow of water therepast, to reduce the velocity thereof and to thereby promote the deposition of particulate matter at and adjacent to the barrier member. The barrier member includes an elongated hollow, substantially cylindrical body which has horizontal and vertical elements that extend around the body and are secured to each other. A ballast member is also provided for weighing down the barrier member.