A marine base located within the West Blue. Marines can take captured pirates to this island, and collect their bounty. The pirates are then sent to the Marine HQ: Blues Prison based upon their bounty level. If its within 100,000,000 Beli, they are kept in the blues. If their bounty exceeds the 100,000,000 Beli bounty, they are sent to impel down after 2 Days of imprisonment in Marine HQ..

Impel Down Floor Distribution:

1st Floor - Crimson Hell: 100,000,001 - 200,000,000
2nd Floor - Wild Beast Hell: 200,000,001 - 300,000,000
3rd Floor - Starvation Hell: 300,000,001 - 400,000,000
4th Floor - Burning Hell: 400,000,001 - 600,000,000
5th Floor - Freezing Hell: 600,000,001 - 1,000,000,000
6th Floor - Eternal Hell: 1,000,000,000 & above.