Kraid's Lair

Kraid's Lair, also known as Brinstar Depths, Kraid's Hideout or simply Kraid, was an area in Metroid, Super Metroid and Metroid: Zero Mission. It is the place where Samus Aran battles the Space Pirate enforcer, Kraid. Kraid's Lair is part of Brinstar. It also appears in Super Smash Bros. Melee as a stage with the name Brinstar Depths.

Description
Kraid's Lair is easily identifiable by the many spikes decorating the walls, floors and ceilings. Kraid himself often fires spikes that can implant themselves in the walls, as well. In Samus' first mission on Zebes, the lair was far more organic than Ridley's, consisting mainly of rocks and plants with little visible technology. However, In Super Metroid the area is largely industrialized, (most likely by the Space Pirates) and there are scarce signs of greenery, save some vines and Kraid's room. In the same game, there is a large presence of Space Pirates in the form of Kihunters and Green Zebesians which patrol the rooms prior to the chambers belonging to Kraid and Mini-Kraid.

Metroid: Zero Mission

 * Unknown Item 2 (Space Jump)
 * Speed Booster

Super Metroid

 * 1 Missile Tank
 * Varia Suit

Enemies

 * Beetom (Super Metroid only)
 * Gadora (Metroid: Zero Mission and Super Metroid only)
 * Green Space Pirate (Super Metroid only)
 * Ki-Hunter (Super Metroid only)
 * Kraid
 * Menu (Metroid only)
 * Mini-Kraid (Metroid and Super Metroid only)
 * Mua (Metroid: Zero Mission only)
 * Reo (Metroid: Zero Mission only)
 * Ripper (Metroid and Metroid: Zero Mission only)
 * Sbug (Super Metroid only)
 * Sidehopper (Metroid and Metroid: Zero Mission only)
 * Skree (Metroid and Metroid: Zero Mission only)
 * X-45G (Metroid: Zero Mission only)
 * Zeela

Metroid: Zero Mission manual
"This is the lair of the largest boss in the fortress - Kraid."