Anti-sea rhinoceros undergarments is a type of underwear that protects the user from being attacked by a sea rhinoceros. They are mentioned in the episode "The Camping Episode" and makes a physical appearance in the online game Camping Chaos!.
They are white pairs of underwear with an illustration of a sea rhino being crossed out.
Role in series
"The Camping Episode"
SpongeBob mentions them when a sea rhinoceros confronts Patrick, Squidward, and him. This makes Squidward nervous since he doesn't have one on him.
They appear if the player draws a circle around the sea bear.