(Meredith) -- After "Spongebob Squarepants" creator Stephen Hillenburg died last week, his ashes were scattered at the most fitting site -- at sea.
Hillenburg died Nov. 26 from complications associated of with ALS, also known as Lou Gehrig's disease. He was 57.
He announced his diagnosis just last year in March 2017.
A death certificate obtained by TMZ shows that Hillenburg's ashes were scattered at sea.
A former marine biology professor, Hillenburg created "SpongeBob SquarePants" for Nickelodeon in 1999. It would go on to become one of the longest-running American television series ever, spawning two feature-length movies.
Nickelodeon issued a statement on Twitter regarding Hillenburg's death.
"We are incredibly saddened by the news that Steve Hillenburg has passed away following a battle with ALS. He was a beloved friend and long-time creative partner to everyone at Nickelodeon, and our hearts go out to his entire family. Steve imbued ‘SpongeBob SquarePants’ with a unique sense of humor and innocence that has brought joy to generations of kids and families everywhere. His utterly original characters and the world of Bikini Bottom will long stand as a reminder of the value of optimism, friendship and the limitless power of imagination."