FMRFamides and FMRFamide-like peptides are neuropeptides (PubMed:16187307). KHEYLRF-amide has an excitatory effect on dissected pharyngeal myogenic muscle system (PubMed:16187307). Functions in RID peptidergic neurons to promote forward locomotory behavior (PubMed:27855782). Expressed in RID peptidergic neurons, and the sensory neurons ALA, PDE and PLN. Defective forwards locomotion whereby sustained long foraging forwards movements are replaced with shortened forwards runs, more frequent pauses and reversals. Belongs to the FARP (FMRFamide related peptide) family.