Predicted to enable RNA binding activity; chromatin binding activity; and histone binding activity. Predicted to be involved in chromatin remodeling and positive regulation of DNA replication. Predicted to act upstream of or within chromatin organization and single fertilization. Predicted to be located in nucleus. Predicted to be active in cytoplasm; nucleolus; and nucleoplasm. Is expressed in eye; gill; muscle; ovary; and unfertilized egg. Orthologous to human NPM2 (nucleophosmin/nucleoplasmin 2).