Excitatory neurotransmitters that directly modulate chromatophore function by activating chromatophore expansion at the chromatophore neuromuscular junction. Present ubiquitously in the brain and regions of the central nervous system as well as in the periphery and throughout the dermal chromatophore layer (at protein level). FIRF-amide. ALSGDAFLRF-amide. FLRF-amide. FMRF-amide 1. FMRF-amide 2. FMRF-amide 3. FMRF-amide 4. FMRF-amide 5. FMRF-amide 6. FMRF-amide 7. FMRF-amide 8. FMRF-amide 9. FMRF-amide 10. FMRF-amide 11. Belongs to the FARP (FMRFamide related peptide) family.