He is a skinny yellow anchovy who wears a light blue sweater with brown pants and large round black glasses. He has a large visible bald spot on his head. He was originally maple brown in his debut.
Role in series
Octavius Rex is a recurring character in the series. He has made some short major appearances throughout the series as well as minor non-speaking ones. He first appears in "The Chaperone" but has a long absence until his appearance in "Goodbye, Krabby Patty?"
Octavius appears alongside Maestro Mackerel at the concert hall. At first, Maestro does not know who is on the stage, but Octavius tells him it is Squidward and that he is a clarinet player. At first he enjoys watching him play the clarinet, but once Squidward wakes up he hates it.
Octavius is one of the customers in the Krusty Krab who orders the Krabby Soup. Sunshine emerges from the soup bowl and kisses him, causing his wife, Incidental 104, to hit him, complaining that he loves his soup more than her.
When Octavius is served his food on weights, he cannot lift them. Larry and Incidental 24 yell at him to push the weights, so he does, and manages to lift them onto a table. However, he passes out before he can eat.
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He appears as an employee at Goofy Goober's Ice Cream Party Boat along with Teen 9, constantly mentioning that Goofy Goober employees get free ice cream all day long, giving Patrick the idea to get a job at Goofy Goober's.
- Starting with "Mutiny on the Krusty," he no longer says just "meep" and now speaks mostly in full sentences.
- Ian Vazquez made a post on Twitter of "Octavius Rex & Octavius Rex Jr." ("Mutiny on the Krusty" Octavius Rex holding "The Chaperone" Octavius Rex) on March 18, 2021.