Bubble Guppies is an Canadian animated children's fantasy television series created by Jonny Belt and Robert Scull and developed by Belt, Scull, and Janice Burgess for Nickelodeon. The series is a combination of the sketch comedy, edutainment, and musical genres, and revolves around the underwater adventures of a group of merperson preschoolers named Molly, Gil, Goby, Deema, Oona, Nonny, and new student Zooli. The program premiered on Nickelodeon on January 24, 2011, and ran for six seasons until June 30, 2023. The series is produced using 3D software.

The episode starts with the show logo in a room and it is filling with water. Then the Little Fish 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 pop 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 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 dance song is typically performed. In Season 1, the dance song occurred before the story segment, and both were preceded by a second "Let's think about it" segment. After all that, Gil and Molly do another sketch.

The guppies may either go on a field trip (upon which, since Season 2, they literally yell out "FIELD TRIP!") or do a special activity that focuses on the theme. 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 keeps the initial format, but this time has the story segment take up the majority of the episode, and incorporates the shop and lunch segments into the narrative (basically with the new structure, the store and meal parts are now integrated into the story and the story section takes up the bulk of the show). 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. With the exception of select special episodes, Mr. Grouper's overall presence in the show was primarily reduced to the beginning class segments. Gil and Molly's sketches were removed as well, instead having Mr. Grouper wave goodbye to the viewer as the guppies go back inside.

• Molly - A 4 year-old bubbly human guppy girl. She is the primary host of the show (along with Gil) and Gil’s best friend. Molly appears alongside Gil in the transitional segments, where she aids Gil in hopes that problems won't arise. She has tan skin, long pink hair, and brown eyes. She wears a cadet and turquoise blue striped tail and bikini. Brianna Gentilella provides her singing voice in all seasons and her speaking voice in seasons 1–2 and season 6 episodes 2-13 and from episode 15. Her speaking voice is provided by Bailey Gambertoglio in seasons 3–4 and Taylor Kaplan in seasons 5–6.
• Gil - A silly 4 year-old human guppy boy. He is the secondary host of the show (along with Molly) and Molly’s best friend. 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 has fair skin, blue sideswept hair, and blue eyes. He wears a green and forest green tail. 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 seasons 5–6. His singing voice is provided by Teddy Walsh in season 2 episode 4–season 3, Nirvaan Pal in season 5 and Brody Bett in season 6.
• Goby - A 6 year-old human guppy boy with an imaginative personality. He is also good friends with Gil. He has dark skin, curly navy blue hair, and brown eyes. He wears a blue and purple tail.[9] He is voiced by Jelani Imani in seasons 1–2, Marleik "Mar Mar" Walker in season 3, Issac Ryan Brown in season 4, Caleb Clark in season 5 episodes 1–24 and Josiah Gaffney in season 5 episode 25–season 6. His singing voice is provided by Christopher Borger in season 1 and Johntae Limpscomb in seasons 3–4.

Deema - A 6 year-old human guppy girl with a wild imagination and often plays the role of shopkeeper in the "store" segments. She has fair skin, large curly blonde hair, and blue eyes. She wears an orange tail and bikini with sunglow polka dots and orange earrings. She is voiced by Angelina Wahler in seasons 1–2, Grace Kaufman in seasons 3–4, Catherine Bradley in season 5 and Zoe Glick in season 6. Her singing voice is provided by Selena Gonzalez in season 1.

• Oona - A 3 year-old human guppy girl with a sweet personality. She has pale skin, purple pigtailed hair, and brown eyes. She wears a purple and dark purple tail and a pink star clip in her hair.[9] She is voiced by Reyna Shaskan in seasons 1–2, Tori Feinstein in seasons 3–4, Colby Kipnes in seasons 5–6, and Mia Lynn Bangunan from season 6 episode 8.
• Nonny - A 6 year-old human guppy boy with an intelligent personality. Despite not smiling a lot, he is the most polite and mature member of the group. He is also Oona's best friend. He is smart and helps Deema pronounce words and helps his friends answer their questions. He has fair skin, short stubby orange hair, and green eyes. He wears a green and kiwi green striped tail and blue scuba glasses. He is voiced by Eamon Pirruccello in seasons 1–2, Jet Jurgensmeyer in seasons 3–4, and AJ Kane in seasons 5–6. His singing voice is provided by Eason Rytter in season 3.
• Mr. Grouper - A big orange goldfish and the guppies' teacher. He respects the kids' imaginations, ideas, and suggestions. A prominent feature in seasons 1-4 is that he can also change his natural orange skin into a wide variety of different colors and patterns. He is voiced by Tino Insana from 2011 to 2016 until his death in 2017, and Fred Tatasciore since 2014. His singing voice is provided by Chris Phillips in seasons 1–4.
• Bubble Puppy - 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.
• Zooli - A 7 year-old human guppy girl first introduced in season 5. She is an animal expert. She has dark skin, curly purple hair in a bun, and dark brown eyes. She wears a magenta and pink swirled tail and a blue seashell headband in her hair. She is voiced by Leah Janvier.
• Little Fish - A group of small orange 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 seasons 5–6.

Although it started on Nickelodeon in 2011, the show started production in 2010 at the Nickelodeon Animated Studio.

The series was created by the duo of Jonny Belt and Robert Scull, who had previously served as staff writers and executive producers on another Nickelodeon animated series, The Backyardigans (2004-2013), created by Janice Burgess. Burgess also developed the concept of Bubble Guppies with Belt and Scull. In addition, Belt and Scull served as supervising art director and supervising director, respectively; both were roles they held on The Backyardigans as well.

The voice cast is based in New York and California and the dialogue is recorded at New York-based Dubway Studios and Rhumba Recorders and Burbank-based Nickelodeon Animation Studio.

In addition to Nickelodeon Animation Studio, outsourced animation was provided by Wildbrain Entertainment for season 1, Nelvana for seasons 2 to 4, and Jam Filled Entertainment for seasons 5 to 6.

In June 2019, an announcement was made that the series would return. It returned on September 27, 2019 with season 5 premiere. Season 6 premiered October 19, 2021, and ended June 30, 2023. 

The program first premiered on January 25, 2011, the second season then premiering on November 4, 2011 of the same year. Season 3 premiered on August 12, 2013, with an episode entitled, "Get Ready for School!". Season 4 premiered on May 21, 2015. The program was canceled on October 21, 2016, But Season 5 premiered on September 27, 2019 after a three year hiatus. The final season premiered on October 19, 2021, until the series finale on July 1, 2023. The show was not renewed for a Season 7. The show was ended after its Nickelodeon run.