Neurotoxin that is active on vertebrates (PubMed:33764053). When tested at high doses (10 uM), the toxin affects all zebrafish and mouse DRG neurons in culture, which could be an indication of an effect on a widely expressed receptor or ion channel found in both species (PubMed:33764053). At low doses (1 uM), the effects of the toxin are confined to a specific subpopulation of zebrafish and mouse DRG neurons (PubMed:33764053). In vivo, it induces long-lasting dramatic alterations in the locomotor behavior of zebrafish larvae (PubMed:33764053). It rapidly induces hypoactivity and death of larvae at high doses and it causes hyperactivity at lower doses (PubMed:33764053). In zebrafish adults, intramuscular injection causes the decrease of the movements and visited spaces (PubMed:33764053). In mice, intracranial injection causes lethargy and prolonges sleeping phases and reduced movement (PubMed:33764053). Expressed by the venom duct. The mature peptide does not contain cysteine residue. Belongs to the FARP (FMRFamide related peptide) family.