Happy Clam Day
Trivia
- This is the only episode to have the same vowel in the title, with that being the letter 'A'.
- Before the Guppies send the invitation to Sam, Deema starts dancing and singing "Happy Clam Day" in the style of the song "Yankee Doodle".
- Instead of saying "It's me, Molly!", Molly opens the episode with "I'm Molly!" for the second and final time.
- Voice director Maria Estrada makes the guest voice in this episode.
- Instead of saying "It's time for lunch!", Nonny says "Time for lunch!".
- Though it is reported that Tom Kenny, who is best known for voicing the titular character from fellow Nickelodeon series SpongeBob SquarePants (which is also set underwater), plays Sam in this episode, he is uncredited, even in additional voices.
- The Nickelodeon lightbulb logo and the laughing sound from the 2001 and 2008 split-screen credits logos instead of rebrand current logo from promotional material were used, since it was produced in 2009.
- Nonny doesn't narrate during story time in this episode.
- This is the 1st episode of Season 1 in production code order.
- The Bubble Guppies are singing about mail like in Blue’s Clues when Steve, Joe, and Blue sing the Mailtime Song.
- In Brazil, the lightbulb Got plastered By The 2009 logo.
- This episode was made in 2009.
- Before everyone says good morning to Mr. Grouper, Molly and Gil already arrive.
- After the Pop Song, Nonny appears outside the post office and then swims inside it. We also see both, Molly and Oona waiting in line. Usually, the second person doesn’t appear until after the first person, but in this episode, Oona is shown behind Molly.
- During the story segment, Goby plays both the narrator and the boss of Zip.