Contrary to popular belief, Squidward from “SpongeBob SquarePants” is an octopus, not a squid. He only has six legs, because, six were easier to draw than eight. Stephen Hillenberg has also gone on to say Squidward sounded funnier than Octoboy. Even so, in some foreign dubs, Squidward has been renamed Octo.
2. 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."
3. Squidward makes various references to 11 minutes. Every episode of SpongeBob SquarePants lasts about 11 minutes 30 seconds.
4. 25% of Spongebob Squarepants viewers are adults with no children.
5. 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.
7. The muscular fish found frequently in SpongeBob SquarePants episodes is actually supposed to be a goldfish and is named Frank.
8. According to concept art, the "Krabby Patty" was originally going to be called the "Barnacle Burger."
9. SpongeBob is ambidextrous, meaning he is able to write with both hands.
10. 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.
12. Whenever havoc breaks out in ‘SpongeBob SquarePants’, Fred the fish cries “My leg!”
13. To create SpongeBob's distinctive laugh, Tom Kenny hits his throat with his hand repeatedly while saying, "Ahh."
14. Patrick from SpongeBob SquarePants is portrayed as dimwitted and lacking common sense because starfish do not have a brain.
15. Spongebob Squarepants' pet, Gary the Snail's real name is Gerard Wilson Jr. Gary the Snail's father happens to be a brother of Herb Star, Patrick Star's father, making Gary the Snail and Patrick Star first cousins.
16Stanley S. SquarePants
SpongeBob's last name is SquarePants, but all of his relatives are round, except Stanley, who is part square, as it was revealed in season five, episode twenty, "Banned in Bikini Bottom/Stanley S. SquarePants."
17. SpongeBob's favorite color is beige. His favorite ice cream flavor is vanilla.
18. SpongeBob's birthday is July 14th one day after his voice actor Tom Kenny's birthday.
19. Mrs. Krabs, Pearl's mother is never seen implying that she is either deceased or she and Mr. Krabs are divorced.
20. The Krusty Krab has only 2 employees because Mr. Krabs is a cheapskate.
The Spongebob producers originally used royalty-free marching music at the end of "Band Geeks," but couldn't find music they liked. They instead used David Glen Eisley's "Sweet Victory." The song went from nearly unknown to selling 300,000 downloads on iTunes within a year of the episode airing.
22. There is a Spongebob Episode (Titled "Bubble Buddy Returns") in which Mr. Krabs remembers that Bubble Buddy didn't pay for his food. This is one of the few instances where Spongebob has shown legitimate continuity.
23. The Krabby Patty secret formula is King Neptune's Poseidon Powder.
24. The Krusty Krab is modeled after a New England lobster trap.
25. An episode of Spongebob Squarepants in which Spongebob was fired from the Krusty Krab caused a huge amount of controversy and backlash due to its depiction of unemployment.