The Submerged Island is one of the most intriguing areas in the Third Sea of Blox Fruits, offering a mix of underwater exploration, tough enemies, and essential questlines for progression. Unlike many other islands, this one is fully submerged beneath the sea, adding a layer of atmosphere and challenge for players venturing into it.

The island lies beneath the waters near Tiki Outpost. To reach it, players must speak with the Submarine Worker inside Sub Port 01, close to the second dock at Tiki Outpost. However, access is restricted: you'll need to have defeated the Tyrant of the Skies raid boss before the worker allows you to dive.
Once inside, the Submarine Worker can also ferry players back to Tiki Outpost for free, or to other islands for a fee ranging from $10,000 to $40,000.
The island is crawling with dangerous foes that scale with your level progression:
These enemies form the backbone of the island's quests and offer high EXP rewards, making Submerged Island a critical farming spot.
Several notable NPCs reside here:
The Submerged Island features multiple quest givers, each scaling in difficulty. Here's a breakdown:
| Quest Giver | Task | Required Level | Reward |
|---|---|---|---|
| Submerged Quest Giver 1 | Defeat 8 Reef Bandits | 2600 | $15,450 + 145,000,000 EXP |
| Submerged Quest Giver 1 | Defeat 8 Coral Pirates | 2625 | $15,500 + 147,000,000 EXP |
| Submerged Quest Giver 2 | Defeat 8 Sea Chanters | 2650 | $15,550 + 150,000,000 EXP |
| Submerged Quest Giver 2 | Defeat 8 Ocean Prophets | 2675 | $15,600 + 152,000,000 EXP |
| Submerged Quest Giver 3 | Defeat 8 High Disciples | 2700 | $16,650 + 154,000,000 EXP |
| Submerged Quest Giver 3 | Defeat 8 Grand Devotees | 2725 | $16,700 + 156,000,000 EXP |
The progression makes it clear that Submerged Island is tailored for late Third Sea grinding.
If you're looking to optimize your grind on Submerged Island, the quest chain is only half the journey—having the right gear and items makes the difference. Many players also search for where to buy Blox Fruits items to speed up their progression, especially when facing tougher mobs in the Third Sea. Choosing reliable sources ensures you're prepared for every challenge this island throws at you.
The Submerged Island stands out as both a progression checkpoint and a unique environment in Blox Fruits. With its heavy reliance on underwater theming, high-level quests, and ties to fighting style unlocks, it's a must-visit for any player advancing through the Third Sea. While bugs and movement restrictions can be frustrating, the rewards make it worthwhile. Players should approach prepared for tough battles and long grind sessions.