Leo is a whale shark. During the yearly whale shark migration, as shown in The Biggest Fish, Leo became sick and fell behind his herd. He was also trying to find his brother Jeanby.

Tubarina, Ester and Polvina took Leo back to the Shark Palace in order to find a cure for Leo's illness. However, Leo went to find Jeanby, who was trapped in a Dryland shipwreck. After saving his brother, Leo returned to the Shark Palace, where Tubarina gave him the medicine before he left to rejoin his herd.


Leo (front) with his brother Jeanby (back)

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