Shark Fin

A Shark Fin is an item given by the Shark Fin Salesman. It is not required to complete the quest of Shark Tooth Island and is an optional item to obtain. When you put it on it will appear on your back. There is also a different colored version on some costumes, like the hammerhead shark.

Trivia

 * This is the first optional item to be created in Poptropica, the second being the Viking Suit on Time Tangled Island.