Jelly Island is one of 34 islands surrounding Whole Cake Island as part of the Big Mom Pirates' main territory known as Totto Land. It is run by Charlotte Kanten, the Minister of Agar (寒天大臣 Kanten Daijin?).
Pururun Town (プルルンタウン Pururun Taun?) is a city situated on the island.
Less than 62 years ago, Jelly Island became part of the Big Mom Pirates territory also known as "Totto Land", and its appearance was changed to its current look using Charlotte Linlin and Streusen's Devil Fruits (the Soru Soru no Mi and Kuku Kuku no Mi respectively).
- Pururun Town is probably named after "Pururun Dessert", Japanese brand making jelly desserts.