Sea 4 — The Fourth Sea
Map, bosses, fruits & release date — April 2026
What is Sea 4?
Sea 4 — officially called the Fourth Sea — is the next major biome expansion for Blox Fruits, following the First, Second, and Third Seas. Each sea introduced a new difficulty tier, islands, quests, NPCs, and a raised level cap. Sea 4 is expected to be the largest addition in the game's history.
Developers have described it as a 'mythic-tier' endgame zone, implying that the world design, boss encounters, and lore will significantly surpass anything previously released. The Fourth Sea is tied to the V5 race evolutions and likely requires completing major Sea 3 content to unlock.
Sea 4 Map Leaks
UNCONFIRMEDIsland names and descriptions below are based on community leaks and are not officially confirmed. Treat as unverified speculation.
Phantom Island
The main hub island of Sea 4. Rumored to feature a fog mechanic that reduces visibility outside safe zones, forcing players to navigate using quest markers. Reportedly where the NPC merchant for Sea 4 gear resides.
Shadow Cove
An early-progression grinding zone for Lv 2400–2550 players. Dark underwater caves and a permanent night cycle. Allegedly home to Shadow Brute and Phantom Soldier NPC enemies.
Abyss Plateau
A mid-tier island for Lv 2600–2750. A large elevated flat landmass above the fog line, used as the staging area for the Phantom Boss raid entrance.
Obsidian Reef
Leaks describe a sea-floor exploration zone featuring unique 'Depth' mechanics — players take gradual damage without a specific accessory, encouraging gear progression.
Crystal Atoll
A PvP-focused island with a rotating treasure mechanic where killing other players yields Crystal Shards, allegedly used to craft Sea 4 exclusive gear sets.
Sea 4 Bosses
All boss information is leaked / unconfirmed.
Phantom Lord
Raid BossThe flagship Sea 4 raid encounter. Multi-phase fight reported to have 3 stages, with each phase switching the boss's active element (Dark → Ice → Phantom). Allegedly requires 4–6 players and drops the Phantom Gear set plus a 1-in-500 chance at a new mythical fruit.
Shadow Brute Captain
World BossA roaming world boss on Shadow Cove with a respawn timer of ~20 minutes. Drops Shadow Essence, a crafting material for mid-tier Sea 4 accessories.
Abyss Warden
Elite BossA solo-friendly elite boss on Abyss Plateau with a 10-minute respawn. Reliable source of early Sea 4 Beli income and experience for Lv 2600–2700 players.
Sea 4 Fruits & Items
All fruit information is based on community leaks. None have been officially announced.
Phantom Phantom Fruit
MythicalThe most-discussed Sea 4 leak. Allegedly a large-model Beast fruit enabling full phantom form with intangibility frames, AoE dark-energy moves, and a Sea 4 boss-themed ultimate.
Web Web Fruit
LegendaryA rumored Natural-type fruit focused on area control — silk traps, web projectiles, and a mobility move enabling wall-crawl. Dataminers found model references suggesting this is real.
Tide Tide Fruit
RareA water-elemental fruit reportedly tuned for grinding in the early Sea 4 zones. Solid AoE damage and a travel move leveraging the water-heavy Sea 4 landscape.
Sea 4 Level Range
Based on the progression pattern of previous seas, Sea 4 is expected to serve players in the 2400–2800+ level bracket. This is consistent with confirmed developer statements about Sea 4 being endgame content for maxed-out Sea 3 players.
| Zone | Est. Level Range |
|---|---|
| Sea 4 entry (Phantom Island) | Lv 2400+ |
| Shadow Cove (early grind) | Lv 2400–2550 |
| Abyss Plateau (mid grind) | Lv 2600–2750 |
| Obsidian Reef (advanced) | Lv 2750–2900 |
| Crystal Atoll (endgame PvP) | Lv 2900+ |
| Phantom Lord Raid (boss) | Lv 2700+ recommended |
How to Unlock Sea 4 (Speculation)
This section is entirely speculative based on how Sea 2 and Sea 3 were unlocked. No official unlock requirements have been announced.
- Reach level 2400 (expected minimum Sea 4 entry level).
- Complete the final quest chain in Third Sea — likely the Tiki Outpost or related Darkbeard endgame chain.
- Obtain V4 Race (or possibly V5 if available before Sea 4 launch).
- Defeat the Phantom Lord raid boss at least once — speculation only, based on Sea 3's Tushita/Yama requirements.
- Talk to the Sea 4 ferryman NPC, believed to be located at the Floating Turtle island edge.
Frequently Asked Questions
▸When does Sea 4 release in Blox Fruits?
Developers have confirmed the Fourth Sea but there is no official date. Based on the game's track record and the update's scale, we estimate a late-2026 or early-2027 window.
▸What level do you need for Sea 4?
Leaks point to a minimum level requirement of 2400. Sea 4 content will likely scale up to level 2700–3000 based on Sea 3 patterns.
▸What islands will be in Sea 4?
Leaks mention several islands: Phantom Island (main hub island), Shadow Cove (low-tier farming zone), Abyss Plateau (boss zone), and Crystal Atoll (PvP zone). All unconfirmed speculation.
▸What fruits are coming with Sea 4?
Leaks suggest at least one mythical-tier Beast-type fruit (possibly 'Phantom Phantom Fruit') and one Natural-type fruit. Neither has been confirmed by developers.
▸Will Sea 4 replace Sea 3?
No — all previous seas will remain accessible. Sea 4 is additional endgame content, not a replacement. Players will need to complete Sea 3 first to unlock access.
▸Will there be new races in Sea 4?
Developers have confirmed V5 race evolutions tied to Sea 4. There likely won't be entirely new races, but rather upgrades to existing races.
▸How do you unlock Sea 4?
Speculation suggests: completing a Sea 3 quest chain, reaching level 2400, and possibly having a V4 race. The exact requirement is not confirmed.