Historical clue formulations

• Cartoon character who works at the Krusty Krab — 2020-03-29
• Cartoon character created by a marine biologist — 2015-11-19
• Friend of Squidward on Nickelodeon — 2015-03-18
• Nicktoons character — 2013-11-21
• Squarish TV toon — 2013-11-13
• Animated TV character with buck teeth — 2009-12-16
• Squidward's neighbor on Nickelodeon — 2009-05-23
• Title TV character in Bikini Bottom — 2008-08-28