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The Biological Experiment Floor is a room in the Biosphere in Metroid: Other M. The room is the location of a large Kihunter Nest, protected by a King Kihunter. It bears resemblance to an earlier explored room in the area, with a long, curving platform leading to the top of a pillar. However, the room gives off a blue atmosphere and is more organic in composition.
Several Whipvines are attached to the wall of the central structure and try to hit Samus with their tentacles. A Missile Tank can be found as Samus ascends the hive. As Samus reaches the top, she will find a hole leading into a chamber at the base of the structure. Here, she will encounter several Zero soon alerted by a loud screech and be attacked by numerous spawning Kihunters. She must destroy several support structures for the main structure in the room, which will then cause it to crack and reveal a King Kihunter. Samus then must fire Missiles at it to agitate it. When defeated, the King hardens into stone and the remaining Kihunters flee. Samus then notices Little birdie feeding on their honey, and knows that she was used by the creature. She leaves as Adam gives her her next instructions.
The room has its own theme music: 
|Areas of the BOTTLE SHIP|
|Areas||Main Sector • Sector 1 / Biosphere • Sector 2 / Cryosphere • Sector 3 / Pyrosphere|
|Sub-Areas||Bioweapon Research Center • Experimental simulated desert area • Section 4 Gravity Block • Sector Zero|
|Rooms|| Main Sector: Spaceport • Bottle Ship Control Room • Bottle Ship Residential Area • Cargo Hold • Control Bridge • Main Elevator |
System Management room
Biosphere: Biological Experiment Floor • Experiment Floor 3 • Biosphere Test Area • Breeding Room • Exam Center
Observation Room • Scrap Block • Subterranean Control Room
Cryosphere: Experiment Floor • Materials Storehouse • Materials Transfer Lift • Water Tank • Nightmare's Room
Sector Generator Room
Pyrosphere: Blast Furnace Observation • Crater Interior • Desert Refinery • Environmental Test Floor
Floor Observation Room • Geothermal Power Plant
Bioweapon Research Center: Room MW