Japanese angelshark is eaten and the rough skin is made into a type of leather called shagreen for use in wood finishing. Angel sharks in general are highly threatened by commercial trawl fisheries due to their susceptibility to capture and low rate of reproduction, and angel shark species elsewhere are known to have declined markedly under fishing pressure. Trawling activity in the Yellow Sea and other parts of the northwestern Pacific is intense and, coupled with pollution, has had a serious impact on the local ecosystem. The Japanese angelshark population is suspected to have declined by up to 50% or more under
Horween Leather Company Tack" process. Although footballs are often called "pigskins," they are made from Horween Leather Company-supplied steer hides that are embossed with a pebble pattern. The company also supplies the leather for the game balls made for the Canadian Football League, and they also supply leather to Spalding (a division of Russell Corporation) for indoor Arena Football League footballs. Horween Leather Company's leather is also used to make National Basketball Association basketballs. Horween Leather Company Horween Leather Company is an American company specializing in the manufacturing and refining of leather and related products. It is one of the oldest continuously running