Starting the conversation, writer, comedian, and activist Celeste Yim said she always thought Spongebob was a kitchen sponge.
"I have only just discovered that Spongebob is a sea sponge? I thought he was maybe a regular sponge with an eclectic lifestyle," she wrote on Twitter.
"My friends were mocking me like 'HOW DID U THINK HE COULD BREATHE UNDERWATER'. I was like hmmmm I dunno I guess I figured he's a cartoon sponge?"
Following the tweet, Twitter users were divided on the type of sponge the character, who lives in a pineapple house under the sea, is.