Scooter(Incidental 38) is a surfer fish. Along with Larry the Lobster, he is a common attendee of Goo Lagoon. He is easily identified by his high-pitched, shaky voice and commonly speaking surfer lingo.
He first appears in the episode "Ripped Pants" and is most commonly voiced by Carlos Alazraqui. He was a prominent recurring character in the first three seasons, but from the fourth season onward, Alazraqui has been mostly absent from the show. Scooter's roles and voice have been mostly inconsistent since then.
On the model sheet images compiled by Vincent Waller, he is called "The Dude."
He is a lavender-purple fish with light purple fins and legs and light green lips. He typically wears light blue swim trunks with a floral design.
In his first few appearances, he wore lavender and yellow swim trunks. In some of "Walking Small," he is green with red swim trunks and sandals. Since the end of "Walking Small," he has changed back to his normal design.
He gets bonked on the head repeatedly by Incidental 24 while at Goo Lagoon. Later, he is seen when SpongeBob gives out free ice cream and is seen going surfing when SpongeBob wraps do not cross tape around. After SpongeBob tells everyone that Goo Lagoon is closed Scooter tells SpongeBob that he and other beach goers like Larry the Lobster.
He is a devoted fan of SpongeBob, Patrick, and Sandy's rock band "Tidal Wave." He wears a wave-themed shirt and visits the band backstage at the Poseidome Colosseum. There, he asks them where their drums and guitars are, and they tell Scooter that they will use seashells instead.
In "Bubble Buddy," he supposedly dies and appears as an angel. Due to the show's lack of flowing continuity between episodes, this does not affect any other stories, and he is seen alive in every season afterward.
This was covered in the sixth video of the non-canonical web series Bikini Bottom Mysteries. The video was titled "Scooter’s Haunting Secret" and discussed possible theories as to how he came back to life.