Enables neuropeptide receptor activity. Involved in several processes, including behavioral response to ethanol; social behavior; and thermotaxis. Located in axon; plasma membrane; and somatodendritic compartment. Expressed in excretory system; neurons; pharyngeal muscle cell; and preanal ganglion. Used to study alcohol use disorder. Human ortholog(s) of this gene implicated in hypertension. Is an ortholog of human PRLHR (prolactin releasing hormone receptor).