Incidental 21 is a fish who makes various appearances throughout the series, beginning with the episode "Ripped Pants." He is classified as a "hotdog" type incidental.
He is a peach-colored fish with big orange eyes and has reddish-brown fins and lips. He also wears a teal (Possibly green) shirt.
Role in series
He is one of the many fish surrounding Incidental 155 while he is holding SpongeBob, who is believed to have drowned, and later appears cheering in the audience during SpongeBob's song.
He sings "The Very First Christmas" along with a bunch of citizens.
He appears several times as one of the many customers participating in the Krusty Krab bulletin board.
He is seen as a patty monster where he shoves Old Man Walker to the side right before the elder was able to eat the chum coming towards him.
He can be seen at the beginning sipping a soda at the Krusty Krab.
He is seen in the crowd at the end of the episode.
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