Kazimieras Gediminus "Kaz" Prapuolenis (born July 31, 1959; age 60) is an American cartoonist and illustrator, and one of the most renowned living "underground" cartoonists of all time. He is a SpongeBob SquarePants crew member, who had worked on season 3 and seasons 9-12 of the cartoon. He has also worked on several other animated television shows, such as Camp Lazlo and Phineas and Ferb. He returned to SpongeBob as an animation writer in season 9.
However, this only happens in the opening credits on USA airings and digital versions. On the DVD releases and international non-USA airings, it just lists him as "Kaz."
He returned to working on the show in 2015 along with the creator, Stephen Hillenburg, after 11 years of being absent. He also took Casey Alexander's place due to Casey retiring from SpongeBob because he wanted to work for Uncle Grandpa.
In "The Getaway," when SpongeBob drives through a coral field, Stickyfins gets hit by corals that spell "Kaz," a reference to the crew member that wrote the episode.