Enables fibroblast growth factor receptor binding activity. Acts upstream of or within fibroblast growth factor receptor signaling pathway and positive regulation of brown fat cell proliferation. Predicted to be active in cytoplasm and extracellular space. Human ortholog(s) of this gene implicated in syndactyly type 8. Orthologous to human FGF16 (fibroblast growth factor 16). [provided by Alliance of Genome Resources, Apr 2022]