Predicted to enable RNA binding activity; chromatin binding activity; and histone binding activity. Acts upstream of or within rRNA processing and rRNA transcription. Located in nucleolus. Is expressed in several structures, including alimentary system; endocrine gland; male reproductive gland or organ; ovary follicle; and respiratory system. Orthologous to human NPM3 (nucleophosmin/nucleoplasmin 3). [provided by Alliance of Genome Resources, Apr 2022]