Abstract: A retractable compact knife spear is provided. The knife spear may include a knife blade, as opposed to standard barbs and may be compacted to strap to a diver's leg. The retractable knife spear may include other features, such as sound signaling devices and may be used as a pointer when leading dive teams. The retractable knife spear is useful for eradication of invasive fish species, such as the lion fish in the Caribbean and along the U.S. east coast.

Abstract: An elastomeric mat is provided, which includes rubber buffings, a binder holding the buffings together, and a coloring agent. A portion of the rubber buffings is randomly and angularly oriented, relative to the lower surface of the mat, to provide a non-uniform upper surface and a non-uniform thickness of the mat. The irregular spacing of the rubber buffings and the irregular surface texture results in a mat resembling natural shredded wood mulch. Fertilizer may also be incorporated on, or within, the mat to nurture trees or other plants about which the mat is placed.

Abstract: A mulch mat made of recyclable material is provided having a surface made of recycled material such as rubber and another surface made of a weed inhibiting fabric. The fabric extends from at least one edge of the mat to provide an overlapping area upon which another of the mats sits to prevent weed, grass and other plants from growing between the mats.

Abstract: A mulch mat made of recyclable material is provided having a mulch-appearing surface made of recycled material such as rubber and another surface made of a plant inhibiting fabric. The fabric extends beyond the mulch-appearing surface on at least one edge of the mat to provide an area upon which another of the mats may be positioned to prevent weed, grass and other plants from growing between the mats. In addition, the mulch mat may include fertilizer to nourish nearby trees, bushes and the like.