1Krusty Krab's siren
The Krusty Krab's siren is identical to the siren used in The Shawshank Redemption (1994), which also featured Clancy Brown.
SpongeBob was originally named SpongeBoy, but that name was already trademarked for a cleaning product.
The muscular fish found frequently in SpongeBob SquarePants episodes is actually supposed to be a goldfish and is named Frank.
According to concept art, the "Krabby Patty" was originally going to be called the "Barnacle Burger."
SpongeBob is ambidextrous, meaning he is able to write with both hands.
Bikini Bottom from Spongebob Squarepants has a defined location - under the Bikini Atoll, which was where the nuclear weapons were tested. Bikini swimsuit was also named after the island.
One of the first episodes of SpongeBob SquarePants named "Reef Blower", was originally going to have dialogue, but was re-written to have none because the recording equipment broke.
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Whenever havoc breaks out in ‘SpongeBob SquarePants’, Fred the fish cries “My leg!”
To create SpongeBob's distinctive laugh, Tom Kenny hits his throat with his hand repeatedly while saying, "Ahh."
Patrick from SpongeBob SquarePants is portrayed as dimwitted and lacking common sense because starfish do not have a brain.