The entertainment world is mourning the loss of Stephen Hillenburg, the creator of "SpongeBob Squarepants," who died on Tuesday at the age of 57.
Last year, Hillenburg was diagnosed with the neurodegenerative disease ALS, or Lou Gehrig's disease.
SpongeBob has turned into a worldwide phenomenon with not only the popularity of the show, but the billions of dollars in merchandise that has been sold worldwide.
In honor of Hillenburg, his genius idea and tireless work for over two decades, test your knowledge of SpongeBob by taking the quiz below.