Hive Mecha

The Hive Mecha is the second boss Samus faces in Metroid Prime. They are classified as a second-generation combat drone, able to interface with organic units at a higher level. It trains, shelters, and works its hive dwellers. However, the device is very weak; without any methods to defend itself, it solely relies on the creatures that reside in it to handle any threats, in this case Ram War Wasps. The Mecha is vulnerable around its access ports and can't withstand many shots from the Power Beam.

Version Variation
In the PAL and Japanese versions of the game, Hive Mecha's scan point is positioned higher while the American version is located underwater.

Logbook Entry
Mechaniod: "Hive Mecha, security unit programmed to work with predatory hive dwellers. A design flaw makes the shielding on Hive Mecha weak around their access ports. These units are second-generation combat drones, able to interface with organic units at a higher level. They train, shelter, and work with hive dwelling predators. Unarmed, they rely on their hive beasts to handle any threats."

Battle
The main thing to watch for is the surrounding corrupted water. Falling into this is an issue and since Samus has no Gravity Suit, moving out of the toxic fluid will take a little time and time is critical with no spare energy tanks. The way to fight Hive Mecha is by first eliminating the Ram War Wasps. They battle by surrounding enemies and flying around them at high speeds in hopes of causing dizziness. They will, however, pause in hesitation before they sting. This is Samus' chance to kill them. After the present Wasps are gone, the Hive Mecha opens up an access port, probably to let in the Wasps even though they are dead, and is vulnerable. Samus must fire at it and it will rotate and open up again. Samus is to repeat this pattern, with more and more Wasps to deal with, and the Missile Launcher is in her possesion once again.

The destruction of the Hive Mecha awards Samus with the Missile Launcher, which she lost prior to arriving on Tallon IV.

Trivia

 * This is the music when battling the Hive Mecha and Incinerator Drone:
 * This battle is similar to a fight on the planet Norion where Samus must defeat several "Jolly Roger" Drones that surround and circle her.