The currach has traditionally been both a sea boat and a vessel for inland waters. The River currach was especially well known for its shallow draft and manoeuvrability. Its framework was constructed of hazel rods and sally twigs, covered by a single ox-hide, which not only insulated the currach, but also helped dictate its shape. These currachs were common on the rivers of South Wales, and in Ireland were often referred to as Boyne currachs. However, when Ireland declared the netting of salmon and other freshwater fish illegal in 1948, it quickly fell out of use.