Predicted to enable hyalurononglucosaminidase activity. Predicted to be involved in hyaluronan catabolic process. Predicted to act upstream of or within single fertilization. Predicted to be located in external side of plasma membrane and membrane raft. Predicted to be active in acrosomal vesicle. Orthologous to human SPAM1 (sperm adhesion molecule 1). [provided by Alliance of Genome Resources, Apr 2022]