Enables G protein-coupled UDP receptor activity. Acts upstream of or within cellular response to organic cyclic compound; cellular response to prostaglandin E stimulus; and transepithelial chloride transport. Predicted to be located in apical plasma membrane and basolateral plasma membrane. Is expressed in dermomyotome and musculature. Orthologous to human P2RY6 (pyrimidinergic receptor P2Y6). [provided by Alliance of Genome Resources, Apr 2022]