Mr. Grouper is the best teacher in the world! He's friendly, funny, and full of information! He genuinely respects the Guppies intelligence, encourages their curiosities and nurtures their imaginations. Mr. Grouper 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 out. Mr. Grouper always ends the school day with an awesome field trip and a celebration of the episode's topic. Mr. Grouper can also change colors. He is a very good friend to all the Guppies.
Mr. Grouper is orange, with goldish yellow stripes on both sides of his body. In season 2 however, his body is a slightly lighter orange and yellow.
Mr. Grouper's voice actor, Tino Insana, is well known for playing Dr. Reginald Bushroot in Darkwing Duck, Uncle Ted in Bobby's World and Pig in Back at the Barnyard.
Mr. Grouper's singing voice, Chris Phillips, plays various background characters within the show. He was the original voice of Face, one of Nick Jr.'s previous mascots. He also does voiceover work for Nickelodeon's promos and commercials.
Mr. Grouper is the only major Bubble Guppies character to not play an electric guitar in an episode of Bubble Guppies.
Mr. Grouper's favorite colors are white and yellow.
Mr. Grouper's name is "Professor Cooper" in the European French dub, along with most of the other Bubble Guppies Characters. This is likely because he the name was a prononciate issue or it sounded better in french.
Mr. Grouper and Nonny are usually the only ones to answer questions from the guppies. (Aside from when asking a question to a character such as a crab or snail.)