The Shark Fin is one of the decorative items that you can get in Shark Tooth Island. Since there are lots of items that you can loot anywhere in Poptropica Island, it’s good that you have all of them as a souvenir and to customize your character. The Shark Fin fits on your back and works with just about any other costume pieces in the game.
Getting the Shark Fin
Right after getting the Key Ingredient in the underground chamber of Ancient Ruins, there is a vine beside it. Climb up and you will appear out of a hole in the sand right at the beginning part of the island next to the guy selling shark fins. You can also find him right after arriving in Shark Tooth Island the man will offer you Shark Fins that you can put on.