Nub is a dolphin who features in The Great Escape.
He lures Ping and Patchy into a Drylander trap so that they can take them to an aquarium. He initially believes that they would like it there, but he realises his mistake when he is captured as well. When he is freed by Tubarina and her friends, he decides to help them escape by splashing water onto his Drylander masters. Nub then decides to live in the sea with the rest of his kind. Though Ping and Patchy initially distrust him, they allow him to join their pods.