Predicted to enable hyaluronan synthase activity. Predicted to act upstream of or within several processes, including circulatory system development; hyaluronan biosynthetic process; and renal water absorption. Predicted to be located in Golgi apparatus; extracellular vesicle; and plasma membrane. Is expressed in anatomical system; pharyngeal arch; and primary germ layer. Orthologous to human HAS2 (hyaluronan synthase 2).