Understanding how brains coordinate social movements could illuminate fundamental mechanisms of human social bonding and autism spectrum disorders. This research reveals that social approach behaviors involve sophisticated neural preparation that begins well before any visible movement occurs. Using innovative head-fixed zebrafish that could still move their tails while interacting with free-swimming partners, scientists captured unprecedented detail of brain activity during natural social encounters. The key discovery centers on distributed neural coordination: pallial neurons (analogous to mammalian cortex) increase activity while midbrain and hindbrain regions simultaneously decrease activity several seconds before approach movements. This coordinated pattern reliably predicted which fish would approach social partners and explained individual differences in sociability. Critically, this neural signature appeared only during genuine social interactions, not when fish encountered inanimate objects, demonstrating context-specific social processing. The pallium's central role was confirmed through targeted interventions that disrupted approach behaviors. This work advances our understanding of social neuroscience by revealing that approach behaviors require active neural preparation rather than simple reflexive responses to social cues. The distributed nature of these networks suggests social behavior emerges from coordinated activity across multiple brain regions rather than localized social centers. For translational research, these findings provide a framework for investigating social deficits in neurodevelopmental conditions, potentially informating therapeutic approaches that target specific neural circuits underlying social coordination difficulties.