The violin is a musical instrument in the wooden string family. It is also the smallest and highest-pitched in the family. It appears in the episodes "Something Smells," "Squilliam Returns," and "Suction Cup Symphony."
In the show, it looks like a regular violin used in real life.
Role in episode
Gary plays "Lonely Violin" on the violin to go along with SpongeBob crying while chopping onions.
Mr. Krabs plays "Woe is Me!" on the world's smallest violin.
"Suction Cup Symphony"
Three anchovy fish play the violin when Squidward conducts his symphony.