Squidward's clarinet, often called "Clarey," is a clarinet played by Squidward Tentacles as a hobby various times throughout the series, beginning with the episode "Bubblestand."
The instrument is a black clarinet, with a standard row of silver keys and has a straight, wooden reed coming from the top of the instrument where the player is able to blow into it.
Role in episode
One of Squidward's most notable traits is his love for clarinet playing. It is his favorite hobby. Squidward loves it to the point where he often treats it as if it were alive, giving it the nickname "Clarey." Squidward even sleeps with it and has a small pillow for it to "rest" on, as shown in the episodes "Squidville" and "I Was a Teenage Gary." A common running gag is that the Bikini Bottomites are annoyed by the sound of it due to Squidward's lack of musical talent.
"Food Con Castaways" - It was destroyed when he tries to soothe the beast but it grabs Squidward but the beast drops him and his clarinet breaks in half.
"Snooze You Lose" - A cranky conductor ties it around Squidward's head after making a terrible impression at the audition.
"Lost and Found" - SpongeBob steps on all of them and breaks most of them in two.
"Dunces and Dragons" - Squidly plays at the parade toward the end of the episode, only for a rock to be thrown into his throat.
"SquidBob TentaclePants" - Squidward plays his clarinet when the cloak disguising his and SpongeBob's conjoined body is pulled off by a nail. Soon after, he begins to "serenade" the audience.
"No Hat for Pat" - The customers run out of the Krusty Krab because of the sound.
"Sweet and Sour Squid" - Squidward plays his clarinet throughout the streets, only for food to be thrown at him. Plankton was later arrested for "noise disturbance" from it, as he was near the police and was the one holding it at that moment.
"Salsa Imbecilicus" - Squidward plays his clarinet during the graduation ceremony. However, the graduates find it very annoying as he is playing sour notes.
"Squid Noir" - Squidward plays his clarinet at the Krusty Krab, which deeply annoys the customers and Mr. Krabs. He then plays it at a comic book store, which also annoyed Bubble Bass. He then played it at his own house, which also annoyed Patrick.