Many different factors play a role in determining a person’s behavior. Recent research has been uncovering the role of genetics and neurological processes in the development of one’s personality and tendencies. The overall aim of this project is to identify if the antagonist of Relaxin-3, RLX-33, reverses the effects of the decreased social behavior exhibited by the fish with the ARID1B mutant that also expressed higher amounts of Relaxin-3. Furthermore, these findings will be connected to Autism Spectrum Disorder regarding potential treatment routes as lack of sociability is a common symptom of this disorder.