Why does spinosaurus have a sail?

The sail of Spinosaurus, formed by elongated neural spines on its back, is thought to serve several possible functions. It may have been used for thermoregulation, helping the dinosaur regulate its body temperature by absorbing or dissipating heat. Additionally, the sail could have played a role in display or communication, helping to attract mates or intimidate rivals. Finally, it might have provided some form of stabilization while swimming, given Spinosaurus's semi-aquatic lifestyle.