What does wart turn into from the sword in the stone?

In "The SWord in the Stone," Wart, who is the young Arthur, transforms into a fish after being enchanted by Merlin. This transformation is part of his education, allowing him to experience life from different perspectives. As a fish, he learns about the challenges of survival and the nature of power in the underwater world. Ultimately, these experiences help shape him into the future king he is destined to become.