Enables chemokine activity. Acts upstream of or within chemotaxis and leukocyte migration. Predicted to be located in extracellular region. Predicted to be active in extracellular space. Is expressed in 3rd branchial pouch; central nervous system; hemolymphoid system; retina; and thymus/parathyroid primordium. Orthologous to human CCL25 (C-C motif chemokine ligand 25). [provided by Alliance of Genome Resources, Apr 2022]