Enables phosphoprotein phosphatase activity. Acts upstream of or within negative regulation of protein phosphorylation; protein dephosphorylation; and regulation of heart growth. Predicted to be located in nucleoplasm. Predicted to be active in cytosol. Is expressed in several structures, including alimentary system; embryo ectoderm; embryo mesenchyme; renal cortex; and sensory organ. Human ortholog(s) of this gene implicated in hypogonadotropic hypogonadism 19 with or without anosmia. Orthologous to human DUSP6 (dual specificity phosphatase 6). [provided by Alliance of Genome Resources, Apr 2022]