He is a dark gray buff shark with a light gray dorsal fin. He wears an olive green shirt, dark green pants, an olive green hat, and dark brown boots.
Roderick's personality is that of a stereotypical drill sergeant who is very serious about his job.
Role in episode
He replaces Mrs. Puff after she is fired from her position as driving Instructor, due to SpongeBob failing too many driving tests. While teaching SpongeBob, Roderick's strict training technique of forcing SpongeBob to complete the course blind-folded allows SpongeBob to drive perfectly. However, when SpongeBob begins his official driving test, Sam doesn't allow SpongeBob to wear a blindfold, despite SpongeBob's training only being done with one. SpongeBob then reverts back to his old ways, rampaging across the city. Roderick, in an attempt to stop the dangerous driving of SpongeBob, sacrifices himself to stop the boat, stating that he wants Gunther Fitz to tell his wife that he loves her. His attempt was unsuccessful, and he was hit by the boat, with his fate remaining unknown. His name was never said in the episode.
"No eating in my classroom!"
"Looks like you're the man, Sponge."
Even though Sam said to be a sergeant, the insignia on his shoulder shows that he is a Corporal.
Sam is similar to Gunnery Sergeant Hartman from the 1987 film, Full Metal Jacket because of having a similar personality.