1. Spongebob was created by Steve Hillenburg, a former marine biologist and art teacher who went to art school to study cartooning. Like SpongeBob, Hillenburg once worked as a fry cook at a seafood restaurant.
2. Hillenburg liked drawing marine life and thought sponges were the "oddest of all" these creatures. But the lumpy shape of natural sponges didn't feel right for the character he wanted to create. A sink sponge turned out to be perfect—it's so clean and so square, just like the innocent and un-hip SpongeBob.
3. SpongeBob lives in a pineapple because pineapples are a common motif in Polynesian crafts. In addition, Hillenburg says he thought SpongeBob "would like the smell" of a pineapple home. Smell is a very important sense for sea animals.
4. For those of you who have watched almost every single episode of Bob, do you realise that almost every time someone throws something away, you'll hear a glass breaking sound? Also, in chaotic crowd scenes, you almost always hear someone cry out "My leg!!!!!". Interesting eh?
5. Originally, Spongebob was supposed to be named Spongeboy! Due to the fact that "Spongeboy" was already copyrighted as the name of guess what, a MOP, Hillenburg changed "Boy" to "Bob" and insisted to keep "sponge" in the name as he was afraid that kids might mistake Bob for a piece of yellow cheese!
6. The recipe for Krabby Patties is a well-guarded secret, but creator Hillenburg has hinted that these mystery burgers may be vegetarian. Otherwise, some inhabitants of Bikini Bottom would be cannibals.
7. SBSP has an impressive list of celebrity guests that appeared in some episodes:
- Pink (singer) - Pink appeared in a pirate costume while singing a pirate song in "Truth or Square"
- Victoria Beckham and Sebastian Bach (Skid Row) - Victoria plays voice of Queen Amphitrite, while Sebastian plays her son, Triton in "The Clash of Triton"
- Johnny Depp (actor) - Multi-award winning actor Depp plays voice of Jack Kahuna Laguna in "Spongebob vs The Big One"
8. Tom Kenny, who does the voice of SpongeBob, says his character's laugh was meant to make viewers think of the ocean. It is based on the distinctive call of a dolphin, with just a touch of a seagull's shriek.
9. Patrick's rock sometimes has a small living room ,and sometimes it's just a huge bedroom. And other times it's a whole house! You never know what it's going to look like under Patrick's rock.
10. Squidward's middle name is Johanssen. Also, January 15th is Annoy Squidward Day.