Question: In what year did this pilot episode air of this American animated television series, whose title character held the same name as the show and also included the character Mrs. Puff?
Sentence (from "List of SpongeBob SquarePants guest stars"): Many of the ideas for the show originated in an unpublished, educational comic book titled "The Intertidal Zone", which Hillenburg created in the mid-1980s.
Relevant evidence: No