A shark barrier includes a plurality of resiliently flexible, elongate members that extend in a generally upright condition between a sea floor and a sea surface. The elongate members are arranged so as to have the appearance of a thicket, preferably a kelp forest, when viewed from within the water and include magnets to assist in deterring certain shark species. The elongate members may be secured to the sea floor by an anchoring base and are held in the generally upright condition by a buoy or buoyant material held within the elongate members.

An open ended enclosure with a top, sides, and a bottom, where the sides and the bottom form an interior enclosed space. A buoyant device and an inflatable device are provided, where the buoyant device and the inflatable device are connected to form a combination and where the combination is connected with the top of the open ended enclosure. The sides connect the top and the bottom and the sides form a flexible wall and where the flexible wall consists of a combination of at least three layers, a first, outer, layer, a second, middle, layer and a third, inner, layer. The third layer is connected to the second layer and the second layer is connected to the first layer, and, further, the first layer is a water impervious layer, the second layer is a bioelectrical blocking layer and the third layer is a sound emission blocking layer.

An open ended enclosure with a top, sides, and a bottom, where the sides and the bottom form an interior enclosed space. A buoyant device and an inflatable device are provided, where the buoyant device and the inflatable device are connected to form a combination and where the combination is connected with the top of the open ended enclosure. The sides connect the top and the bottom and the sides form a flexible wall and where the flexible wall consists of a combination of at least three layers, a first, outer, layer, a second, middle, layer and a third, inner, layer. The third layer is connected to the second layer and the second layer is connected to the first layer, and, further, the first layer is a water impervious layer, the second layer is a bioelectrical blocking layer and the third layer is a sound emission blocking layer.