Burrow opening

Burrow openings are hives that spawn Hopping Metroids and Phazon Hoppers. They are encountered in the rooms Entry Canyon, Cavern Alpha, Drop Shaft, and Metroid Cavern on Phaaze. The ones in the Entry Canyon and Drop Shaft can be destroyed by several Hyper Beam shots or a Hyper Missile.

Several indestructible Burrow openings appear in the Metroid Cavern, where they appear in the second part of the room and only spawn Phazon Hoppers. Unlike nests of other species of Hopper, Samus cannot destroy these with her weapons. These openings appear to be composed of hardened Phazon.

When Samus destroys the eyeballBlocker and moves past it, she comes across an indestructible Phazon mass in her path. It glows brightly, and these openings follow it, slowly spawning a dozen Phazon Hoppers to attack Samus. Once she has defeated them all, the mass begins to sizzle and then explode, allowing her to continue.

Official data

Scans

Entry Canyon/Cavern Alpha/Drop Shaft

"Burrow opening allows creatures to quickly exit their nest and attack. A strong blast could collapse it."

Metroid Cavern

"Burrow opening is made of hardened Phazon and is too strong to be collapsed."

Development data

Internal data lists this object as a Super Hopper Nest, with "Super Hopper" being the internal name of a Phazon Hopper.

Gallery

Outside view.

inside of the nest.