The Miami Thunderbolts are a team in the National Thoroughbred League (NTL), a horse racing league that combines competitive racing with entertainment and fan engagement. Initially, the team was known as the Miami Seahorses. However, specific details about the team's history, including the exact timeline of the name change and reasons behind it, are not readily available on the NTL's official press page.​

The NTL has been expanding since its inception, with Miami being one of the finalist cities for new franchises in 2024. The league emphasizes creating long-term stars by having horses compete consistently and aims to provide a festive and engaging experience for fans. All horses are owned by the league and are assigned to teams, ensuring a structured and competitive environment.