Enables frizzled binding activity. Involved in several processes, including defense response to Gram-positive bacterium; germ cell migration; and ventral furrow formation. Located in extracellular region. Is expressed in several structures, including antennal anlage; antennal primordium; central brain anlage; central brain primordium; and head epidermis primordium. Human ortholog(s) of this gene implicated in Hirschsprung's disease. Orthologous to human WNT8A (Wnt family member 8A) and WNT8B (Wnt family member 8B).