FormatAll episodes follow a similar format. The episode starts with the show logo in a room and it is filling with water. Then the Little Fish break the fourth wall, breaks the fourth wall by saying the title of the show to the audience. The series starts with an introduction by Molly, saying 'Hi, it's me, Molly, and it's time for—' only to be stopped by Gil performing an act related to the episode's subject. One or both of the two then state 'It's time for ''Bubble Guppies''!', and the theme song plays. After the theme song, the Little Fish say the episode's name. An event may occur when one or more characters is on the way to school. For example, Avi breaks his tail in "Call a Clambulance!" when Oona is on the way to school. A guppy tells Mr. Grouper about the earlier experience. He suggests, "Let's think about it," and the characters discuss the theme. A song follows, focusing on the episode's main theme. Usually, Molly or Gil sing this song, but there are episodes where Deema or Mr. Grouper sing it instead. One of the guppies may go to a shop that mostly focuses on the theme (example: a doctor's office in "Call a Clambulance!"). The owner of the shop (usually played by Deema) will ask questions about what they need. Jokes and silly responses will eventually lead to the correct necessity. Mr. Grouper often ends this segment by asking, "Excuse me, what time is it?" in a Call and response (music), call-and-response pattern, with the guppies responding, "It's time for lunch!" three times. At lunch, three of the characters make a food pun about the subject of the episode; usually done by Nonny. After lunch, another Gil and Molly sketch is shown. After the sketch, some classroom activity is shown further reinforcing that episode's topic, or Mr. Grouper talks more about the theme. This is usually ended when Mr. Grouper says, "Line up everybody, it's time to go outside!" followed by the "outside song". Outside the classroom, the guppies act out a story about the theme, interfused with Adobe Flash-animated graphics. Once back inside, a second song is typically performed. Afterward, Gil and Molly do another sketch. The guppies may go on a field trip that focuses on the theme. They yell out, "FIELD TRIP!" This may focus on a problem shown earlier and involves the key characters. The episode concludes with a final sketch by Gil and Molly, followed by a shorter version of the theme song. The credits then roll which include a song played earlier in that episode. Season 5 introduced a new series format which has the story segment take up the majority of the episode, and incorporates the shop and lunch segments into the narrative. Gil and Molly simply introduce themselves before the theme song with no opening gag, the show cuts right to school after the theme, and the dance songs and field trips were removed. Gil and Molly's sketches were removed as well, instead having Mr. Grouper wave goodbye to the viewer as the guppies go back inside. A significant contribution to the show's popularity is its two-level humor track. Minor characters include a police officer named Miranda and a winged serpent named Pretzel-coatl. Heavy metal singer Ozzy Osbourne guest starred as Sid Fishy in the 2015 episode ''Super Guppies'', while actor George Takei guest starred in a tour de force sci-fi mashup which pitted him as a Darth Vader-like armored villain against starship captain Gil and his first officer, Mr. Smart (Nonny). Any grownup who has ever seen Monty Python's Meaning of Life will instantly recognize recurring character Mr. Grumpfish, while the episode ''The Puppy & The Ring'' makes in-jokes ranging from JRR Tolkien/The Lord of the Rings, JRR Tolkien to L Frank Baum.
Main characters*Gil is a human guppy boy with a silly personality. He is the co-host of the show with Molly. Gil gets scared easily, and appears alongside Molly in the transitional segments. In those segments, he often attempts to do something but with unexpected results. He is voiced by Zachary Gordon in season 1-season 2 episode 2, Jacob Bertrand in season 2 episode 3-season 3, Jay Gragnani in season 4, and Quinn Breslin in season 5. His singing voice is provided by Teddy Walsh in season 2 episode 4-season 3. *Molly is bubbly human guppy girl. She is the co-host of the show with Gil. Molly appears alongside Gil in the transitional segments, where she aids Gil in hopes that problems won't arise. Brianna Gentilella provides her singing voice in all seasons and her speaking voice in seasons 1-2. Her speaking voice is provided by Bailey Gambertoglio in seasons 3-4 and Taylor Kaplan in season 5. *Goby is a human guppy boy with an imaginative personality. He is voiced by Jelani Imani in seasons 1-2, Marleik "Mar Mar" Walker in season 3, Issac Ryan Brown in seasons 4, and Caleb Clark in season 5. His singing voice is provided by Christopher Borger in season 1 and Johntae Limpscomb in seasons 3-4. *Deema is a human guppy girl has a wild imagination and often plays the role of shopkeeper in the "store" segments. She is voiced by Angelina Wahler in seasons 1-2, Grace Kaufman in seasons 3-4, and Catherine Bradley in season 5. Her singing voice is provided by Selena Gonzalez in season 1. *Oona is a human guppy girl with a sweet personality. She is voiced by Reyna Shaskan in seasons 1-2, Tori Feinstein in seasons 3-4, and Colby Kipnes in season 5. *Nonny is an intelligent human guppy boy. Despite not smiling a lot, he is the most polite and mature member of the group. He is smart and helps Deema pronounce words and helps his friends answer their questions. He is voiced by Eamon Pirruccello in seasons 1-2, Jet Jurgensmeyer in seasons 3-4, and AJ Kane in season 5. His singing voice is provided by Eason Rytter in season 3. *Zooli is a human guppy girl introduced in Season 5. She is an animal expert. She is voiced by Leah Janvier. *Bubble Puppy is Gil's pet puppy and best friend. He has orange and white fur and a green collar with a yellow fish license. He is voiced by Frank Welker. *Mr. Grouper is the guppies' teacher. Mr. Grouper respects the kids' imaginations, ideas, and suggestions. He can also change his skin into different colors. He is voiced by Tino Insana in 2011-2016 and Fred Tatasciore since 2014. His singing voice is provided by Chris Phillips (voice actor), Chris Phillips. *The Little Fish are a group of small goldfish who appear throughout each episode as guides for the viewers. They announce the episode's name and shout out the answers to viewer-response questions, as well as provide commentary in some scenes. They are voiced by Skai Jackson in seasons 1-2, Mia Vavasseur in season 3, Kayla Erickson in season 4, and Jordan Friedman in season 5.
UK Cast*Gil voiced by Hayden Hunter in season 1-3, John Campbell in season 3, & Sam Brown in season 3-4 *Molly voiced by Abriella Bierer in season 1-4 *Oona voiced by Harriet Perring in season 1-2, & Amba Bierer in season 3-4 *Deema voiced by Lauren Reichwald in season 1-3, & Megan North in season 4 *Goby voiced by Lewis Dillon in season 1-3, & Edward Cross in season 3-4 *Nonny voiced by Will Matthews in season 1-4
ProductionAlthough it premiered on Nickelodeon in 2011, the show started production in 2009. The voice cast is based in New York (state), New York and California and the dialogue is recorded at New York-based Dubway Studios and Rhumba Recorders and Burbank-based Nickelodeon Animation Studio.
BroadcastThe series first premiered on January 24, 2011, the second season then premiering on November 4 of the same year. Season 3 premiered on August 12, 2013, with an episode entitled, ''Bubble Guppies: Get Ready for School''. Season 4 premiered on May 21, 2015. Season 5 was renewed on June 4, 2019, and premiered on September 27, 2019.