Enables hyaluronic acid binding activity and hyalurononglucosaminidase activity. Involved in hyaluronan catabolic process. Located in clathrin-coated vesicle membrane. Is expressed in several structures, including nervous system; retina; and testis. Orthologous to human CEMIP (cell migration inducing hyaluronidase 1). [provided by Alliance of Genome Resources, Apr 2022]