Gakuma

Gakuma (ガクマ - Gakuma) are monsters that appeared in the series, Ultraman Tiga. They appeared in episode 2.

Subtitle: Rock Monster (岩石怪獣 - Ganseki Kaijū.)

Alpha
Her height is 58 meters and she weighs 56,000 tons.

Beta
His height is 59 meters and she weighs 58,000 tons.

Alpha

 * Stone Beam : Gakumas can fire a blue ray from their mouth, whatever is hit by the ray is coated in stone.
 * Burrowing : Gakumas can burrow at moderate speeds.

Beta

 * Stone Beam : Gakumas can fire a blue ray from their mouth, whatever is hit by the ray is coated in stone.
 * Burrowing : Gakumas can burrow at moderate speeds.
 * Electric Pulse : Gakuma Beta can release an electric shock from around its body when an opponent is grappling with it. Gakuma Beta can also fire purple electric bolts from his back.
 * Claw Extend :

History
The Gakumas were monsters that have slept underground for years. However once their home was disturbed by a construction crew, the monsters began to rampage to drive off their invaders. The first was Gakuma Alpha who surfaced and attacked the crew, solidifying everyone and everything in her sight with her Stone Beam. GUTS arrived on the scene just as Gakuma Alpha was attacking, and using its new weapon: the DEXUS beam, Gakuma Alpha was destroyed in one shot.

A short time later, Gakuma Beta then surfaced and picked up where its mate had left off, solidifying anything it saw, until it turned its attention to GUTS. Daigo was able to turn into Ultraman Tiga just in time and the two battled. Gakuma Beta's extra array of weapons however proved too much for Tiga to handle and the ultra was quickly put in a fix when the Gakuma fired its stone beam at the Ultra, slowly solidifying him. Fortunately the rock coating was destroyed once Tiga transformed into Strong Mode and the tide of battle turned to Tiga's favor in attacking Gakuma Beta until the monster was destroyed by Tiga's Delacium Light Stream.

Trivia

 * Gakuma shares the same subtitle as Sadora.
 * Although not physically seen, one of the Gakumas are one of the monsters that makes up Beryudora's Right Arm inMega Monster Battle: Ultra Galaxy Legend The Movie.
 * The costume for Gakuma Beta is currently on display at Ultramanland in Kumamoto, Japan