According to series animator Vincent Waller, “there is absolutely no meat in the Krabby Patty. There’s no animal product in there”, something which was always planned by series creator Stephen Hillenburg.[9]
…
he stated that there is no meat served in Bikini Bottom except at the Chum Bucket.
Wtf is a carnivorous sponge? Actually, maybe don’t answer that. I don’t need more nightmare fuel in my life.
AFAIK SpongeBob is not vegetarian.
https://en.wikipedia.org/wiki/Krabby_Patty
Definitely not, according to the Bikini Bottom Horror.
https://makeagif.com/gif/spongebob-clip-14-eating-montage-club-spongebob-ep-X8cHaN