Mini-Kraid

Mini-Kraid, referred to as "Sclayd" in Super Metroid's game data, is a weaker and sometimes smaller version of Kraid seen in Metroid and Super Metroid.

Metroid
There are a few paths that lead to the actual Kraid, so the player may not even encounter Mini-Kraid. He is a brown and blue version of the regular Kraid, however the same size. He only takes one missile to kill and constantly respawns like a regular enemy once Samus leaves the room and re-enters.

Super Metroid
A few rooms before Kraid, Samus will encounter this smaller version of Kraid. Before she sees him, spikes will fly towards her, very similar to how Bowser attacks in Super Mario Bros. As she progresses through the room, she will eventually come face to face to Mini-Kraid.

Mini-Kraid continually shoots spikes from its stomach and will occasionally spit rock-like projectiles from its mouth which will deal some damage. A few Missiles or one Super Missile will easily kill Mini-Kraid. He will respawn once Samus re-enters the room. Kraid in Metroid was originally around this size and fought much like Super 's Mini-Kraid, leading players to believe they were fighting the real Kraid when Super Metroid was first released. However, upon defeating this imposter Kraid, nothing happens, though one of the next rooms contains the much larger real Kraid.

Mini-Kraid did not appear in Metroid: Zero Mission, even though its room in Metroid did.

Trivia

 * In Super Metroid, Mini-Kraid seems to make a cry similar to the Alien creature in the Alien film franchise.

Super Metroid Nintendo Player's Guide
"Only one Mini-Kraid exists. Charge it and shoot it with Missiles."

Kraid falso