Enables sphingosine-1-phosphate receptor activity. Acts upstream of or within positive regulation of cytosolic calcium ion concentration. Predicted to be located in membrane. Predicted to be integral component of membrane. Predicted to be active in cytoplasm and plasma membrane. Is expressed in several structures, including alimentary system; eye; immune system; male reproductive gland or organ; and nervous system. Orthologous to human GPR6 (G protein-coupled receptor 6). [provided by Alliance of Genome Resources, Apr 2022]