G-protein coupled receptor for the neuropeptide like protein nlp-38 (PubMed:30779740). Plays a role in several types of aversive gustatory associative learning including gustatory plasticity and salt avoidance learning (PubMed:30779740). Its role in salt avoidance learning may be through activation of the transcription factor crh-1/CREB and de novo transcription and translation, which in turn promotes the formation of long-term memory (PubMed:30779740). Expressed in head neurons including the ASE sensory neurons and the ASI and AWB chemosensory neurons, the midbody neurons SDQ, and motor neurons in the tail. Belongs to the G-protein coupled receptor 1 family.