Predicted to enable 7SK snRNA binding activity and mRNA binding activity. Predicted to be involved in mRNA splice site selection; positive regulation of mRNA splicing, via spliceosome; and regulation of alternative mRNA splicing, via spliceosome. Predicted to act upstream of or within several processes, including flagellated sperm motility; ncRNA transcription; and nuclear body organization. Predicted to be located in nuclear body. Predicted to be part of ribonucleoprotein complex. Predicted to be active in cytoplasm and nucleus. Orthologous to human CELF3 (CUGBP Elav-like family member 3). [provided by Alliance of Genome Resources, Apr 2022]