Sector 4 (AQA)

Sector 4 (AQA) is one of the six sectors on the B.S.L Research Station. It is an aquatic environment that houses marine creatures, the most notable of which is Serris.

Sector 4 (AQA) Samus above electrified water in AQA

Game(s) Metroid Fusion Landscape Aquatic Upgrade(s) Speed Booster Diffusion Missile Expansions Energy Tanks: 2 Missile Expansions: 9 Power Bomb Expansions: 4 Boss(es) Serris Neighboring Areas Main Deck Sector 2 (TRO) Sector 6 (NOC)

After Samus unlocked the Security Level 1 doors, the X invaded the sector and infected many creatures inhabiting it including Serris. Damage widespread damage occurred, severing wiring which electrified much of the water. This prevents Samus from exploring much of the sector. Once Serris is defeated and the Speed Booster acquired, Samus can lower the water level using the Pump Control Unit.

Shortly after defeating Nightmare, Samus again enters an area of AQA that she could not previously access. There, she acquires the Diffusion Missile.

Manual

Manual info from Metroid Fusion

Sector 4 (AQA):

Sector 4 is used to research marine creatures.

References

Locations in Metroid Fusion
Biologic Space Labs Research Station	Main Deck Sector 1 (SRX) Sector 2 (TRO) Sector 3 (PYR) Sector 4 (AQA) Sector 5 (ARC) Sector 6 (NOC) Habitation Deck Operations Deck
Special Areas and Rooms	Docking Bays Restricted Zone Restricted Laboratory Reactor Silo Central Reactor Core Auxiliary Power Station Quarantine Bay Sub-Zero Containment Pump Control Unit Main Boiler Main Boiler Control Room
Recurring Room Types	Navigation Room Save Room Recharge Room Data Room Security Room