Enables hyaluronan synthase activity. Involved in several processes, including circulatory system development; extracellular matrix assembly; and hyaluronan biosynthetic process. Acts upstream of or within bone morphogenesis and hyaluronan metabolic process. Located in cytoplasmic vesicle and plasma
membrane raft. Is active in plasma membrane. Is expressed in several structures, including alimentary system; brain; embryo mesenchyme; heart; and skin. Orthologous to human HAS2 (hyaluronan synthase 2). [provided by Alliance of Genome Resources, Jul 2025]