SpongeBob SquarePants' creator Stephen Hillenburg is dead at age 57 - ABC News

He said he'd been diagnosed with amyotrophic lateral sclerosis, or ALS, in 2017.
Hillenburg revealed in March 2017 that he had been diagnosed with amyotrophic lateral sclerosis, also known as Lou Gehrig's disease.

Stephen Hillenburg, 'SpongeBob SquarePants' creator, dies of ALS at age 57 - ABC7 Los Angeles

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SpongeBob SquarePants Creator Stephen Hillenburg Dead at 57

SpongeBob creator Stephen Hillenburg dies at 57 - PosAbility Magazine

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Stephen Hillenburg Dead: 'SpongeBob SquarePants' Creator Was 57 – Deadline

History of SpongeBob SquarePants, Nickelodeon