AUTHOR=Amodio Piero , Fiorito Graziano , Clayton Nicola S. , Ostojić Ljerka TITLE=Commentary: A Conserved Role for Serotonergic Neurotransmission in Mediating Social Behavior in Octopus JOURNAL=Frontiers in Behavioral Neuroscience VOLUME=13 YEAR=2019 URL=https://www.frontiersin.org/journals/behavioral-neuroscience/articles/10.3389/fnbeh.2019.00185 DOI=10.3389/fnbeh.2019.00185 ISSN=1662-5153