Frank(lifeguard) is a character that appears in some of the episodes. He first appears in the episode "Ripped Pants" as a lifeguard, where he rushed to save SpongeBob, after he had crashed down with a wave, and washed up on the beach. He was not amused to find out that he had faked the fall for his enjoyment. His appearance was different in "Bubble Buddy," where the beachgoers pushed his lifeguard stand over. He appears in the group of people who want to know how Mr. Krabs and Plankton became rivals. He appears in "The Inmates of Summer," going to the prison, known as Inferno Island. He appears again as a prisoner in "Back to the Past." He appeared recently in "Giant Squidward" appearing in the angry mob. He is seen as an angry Bikini Bottomite frequently. He has also appeared in "Choir Boys," in the Bikini Bottom Men's Choir. He also appears in "Karate Star" running to the Krusty Krab. He is a lifeguard again in "Sand Castles in the Sand." His name was revealed to be Frank in "Free Samples." He appears in green and wears a white shirt and red shorts.
"Hey, look, a cardboard box just washed up on the beach." - ("Ripped Pants")
"Let's scoop out his eyeballs and use them as giant, misshapen soccer balls!" - ("Giant Squidward")