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Mr. Grouper is the Bubble Guppies' teacher. He is friendly, funny, and full of information.
Mr. Grouper genuinely respects the Guppies' intelligence, encourages their curiosities, and nurtures their imaginations. He sees every day as an opportunity for discovery. He knows how to be silly and play along with the Guppies, joining in their pretend play in the classroom and outside.
He always ends the school day with a field trip and a celebration of the episode's topic. He can also change colours. Mr. Grouper is a very good friend to all the Guppies.