Predicted to enable sphingolipid transporter activity. Acts upstream of or within several processes, including lymph node development; lymphocyte homeostasis; and sphingosine-1-phosphate receptor signaling pathway. Predicted to be located in endosome and plasma membrane. Predicted to be integral component of membrane. Is expressed in jaw bone; nervous system; and sensory organ. Human ortholog(s) of this gene implicated in autosomal recessive nonsyndromic deafness 115. Orthologous to human SPNS2 (sphingolipid transporter 2). [provided by Alliance of Genome Resources, Apr 2022]