Enables mRNA binding activity. Involved in germ-line stem cell population maintenance; mRNA catabolic process; and negative regulation of meiotic nuclear division. Acts upstream of or within spermatogenesis. Located in P-body and perinuclear region of cytoplasm. Is expressed in early conceptus; gonad; and telencephalon. Orthologous to human NANOS2 (nanos C2HC-type zinc finger 2). [provided by Alliance of Genome Resources, Apr 2022]