1Mr. Krab
Mr. Krab's birth date is November 30, 1942, as revealed on the characters driver's license, in dream sequences, in season one, episode fifteen, "Sleepy Time/Suds."
2Squidward
Squidward makes various references to 11 minutes. Every episode of SpongeBob SquarePants lasts about 11 minutes 30 seconds.
3Spongebob Squarepants
25% of Spongebob Squarepants viewers are adults with no children.
4Krusty Krab's siren
The Krusty Krab's siren is identical to the siren used in The Shawshank Redemption (1994), which also featured Clancy Brown.
5SpongeBoy
SpongeBob was originally named SpongeBoy, but that name was already trademarked for a cleaning product.
6Frank
The muscular fish found frequently in SpongeBob SquarePants episodes is actually supposed to be a goldfish and is named Frank.
7Krabby Patty
According to concept art, the "Krabby Patty" was originally going to be called the "Barnacle Burger."
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8Ambidextrous
SpongeBob is ambidextrous, meaning he is able to write with both hands.
9Bikini Bottom
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.
10Reef Blower
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.