Parasite Queen

The Parasite Queen is the very first boss in Metroid Prime. Parasite Queens do not exist, normally. The Queen was once an ordinary Parasite, but was mutated with Phazon, by the Space Pirates It is one of several specimens found aboard the Pirate Frigate, one of which is found dead, and the other is killed by the Pirates later on.

Logbook Data
Parasite female, genetically enhanced by unknown means. A weak spot has been detected in this creature's mouth. Use your auto-target to acquire this new target!

Battle
The Parasite Queen is a totally straightforward boss. Simply lock on, and begin strafing to avoid getting hit by her blasts. Fire missiles and Power Beams at the beast, through the gaps in her shield.

When the shield begins to spin, take the opportunity to charge up your Power Beam.

Remember that when the Queen opens her mouth to roar, you can fire into her jaws, dealing extra damage.