Predicted to enable voltage-gated chloride channel activity. Acts upstream of or within chloride ion homeostasis. Located in cell junction. Is expressed in several structures, including extension; gill; ionocyte; mucus secreting cell; and pleuroperitoneal region. Human ortholog(s) of this gene implicated in idiopathic generalized epilepsy 11 and primary hyperaldosteronism. Orthologous to human CLCN2 (chloride voltage-gated channel 2).