Kazimieras Gediminas Prapuolenis (born 1959), known professionally as Kaz, is an American cartoonist, animator, writer, storyboard artist, and illustrator. In the 1980s, after attending New York City's School of the Visual Arts, he was a frequent contributor to the comic anthologies RAW and Weirdo. Since 1992, he has drawn Underworld, an adult-themed syndicated comic strip that appears in many alternative weeklies. He is also known for his long tenure as a storyboard director and writer for SpongeBob SquarePants and work on shows such as Camp Lazlo and Phineas & Ferb. Description above from the Wikipedia article Kaz (cartoonist), licensed under CC-BY-SA, full list of contributors on Wikipedia.
