Enables PDZ domain binding activity. Involved in dendrite development; negative regulation of hydrogen peroxide-induced cell death; and positive regulation of MAPK cascade. Acts upstream of or within dopamine biosynthetic process; locomotion involved in locomotory behavior; and positive regulation of dopamine metabolic process. Located in cell surface. Is active in synapse. Is expressed in several structures, including alimentary system; central nervous system; eye; genitourinary system; and immune system. Orthologous to human GPR37 (G protein-coupled receptor 37). [provided by Alliance of Genome Resources, Apr 2022]