Enables fibroblast growth factor receptor binding activity and growth factor activity. Acts upstream of or within fibroblast growth factor receptor signaling pathway; positive regulation of ERK1 and ERK2 cascade; and positive regulation of cell population proliferation. Predicted to be active in cytoplasm and extracellular space. Human ortholog(s) of this gene implicated in renal agenesis. Orthologous to human FGF20 (fibroblast growth factor 20). [provided by Alliance of Genome Resources, Apr 2022]