FMRFamides and FMRFamide-like peptides are neuropeptides. Expressed in the CNS and thoracic perisympathetic organs (tPSO) but not in the ring gland, midgut or abdominal perisympathetic organs (aPSO) (at protein level). Detected in larvae. Belongs to the FARP (FMRFamide related peptide) family.