Enables calcium-activated potassium channel activity. Acts upstream of or within potassium ion transport. Located in plasma membrane. Is expressed in gut; male reproductive gland or organ; and olfactory lobe. Human ortholog(s) of this gene implicated in migraine with aura. Orthologous to human KCNK18 (potassium two pore domain channel subfamily K member 18). [provided by Alliance of Genome Resources, Apr 2022]