Predicted to enable ligand-gated sodium channel activity. Acts upstream of or within behavioral fear response. Predicted to be located in membrane. Predicted to be integral component of membrane. Predicted to be integral component of plasma membrane. Is expressed in several structures, including adrenal gland; brain; gut; male reproductive gland or organ; and spinal cord mantle layer. Orthologous to human ASIC4 (acid sensing ion channel subunit family member 4). [provided by Alliance of Genome Resources, Apr 2022]