The Tooth Ferry is a vehicle that only appears in the episode "The Whole Tooth."
It is a ship is made to transport baby teeth to a place called Tooth Island. When its horns blow, money pops out.
Role in episode
The Tooth Ferry is mentioned many times throughout the episode. It doesn't fully appear until the very end when SpongeBob shows it to Patrick and Squidward. Squidward believed that the Tooth Ferry was a magical fairy instead of the actual boat.
Tooth Ferry is a pun on the fantasy figure Tooth Fairy and the type of ship called a ferry.