Geozark (ゲオザーク Geozāku), also known as Geo Shark, is a monster that appeared in the TV series, Ultraman Tiga. He appeared in episode 43.

Subtitle: Underground Shark (地中鮫 Chichū Same)


  • Length: 48 m
  • Weight: 53,000 t
  • Origin: Kumamoto Prefecture Underground


Ultraman Tiga

Geozark was the byproduct of the mad scientist Keigo Masaki for him to know who the real identity of Ultraman Tiga is. Geozark first appeared nearby Kumamoto and was about to attack its castle until GUTS arrived and tried to track it. Geozark then disappeared underground before GUTS could do anything else. Later Geozark appeared again, heading towards Mitsui Green Land Amusement Park, threatening to kill several people and children around the park. Goaded by Masaki's advice, Daigo transformed into Ultraman Tiga and managed to pull Geozark out of the ground before it could endanger anyone. After Tiga went into Power Type, he was able to overpower Geozark in battle, but not without Geozark hitting Tiga with a powerful blast of its laser (thanks to the help of its master provoking Tiga). Despite his recent injury, Tiga was able to destroy Geozark with his Delacium Light Stream, but Geozark's deed was done and Keigo had what he needed.


Powers and Weapons

  • Burrowing: Thanks to the drill-like feature of his nose, Geozark can burrow at high speeds.
  • Energy Beam: Geozark can fire a light blue beam of energy from its nose.
  • Extraordinary Jumper: Geozark can jump far distances.
  • Geozark Attack (ゲオザークアタック Geozāku Atakku): Evil Tiga rides on top of Geozark's fin, sliding towards the opponent before he delivers a kick attack. This cannot be considered as a tag-team attack, as Geozark's role is only a supporter and is a part of Evil Tiga (player)'s attack.


Ultraman Tiga Kaiju & Seijin
Ultraman Tiga Golza | Melba | Gakuma | Kyrieloid | Ligatron | Sealizar | Gazort | Critters | Alien Reguran | Different Dimension Witch | Gilanbo | Saki | Machina | Gagi | Evolu | Leilons | Alien Raybeak | Alien Muzan | Rucia | Zara | Gazort II | Sakunaoni | Abolbus | Redle | Fire Golza | Gobnu (Vaha) | Gobnu (Giga) | Gobnu (Ogma) | Enomena | Deban | Magnia | Magnia Parasites | Dinosauroid | Naga | Weaponizer | Litomalus | Kyrieloid II | Silvergon | Gagi II | Shadow | Obikoboushi | Jobarieh | Maya Cruz | Alien Natarn | King Molerat | Morat | The Life Form of Planet Bizaamo | Bizaamo | Shiela | Vampires | Kyuranos | Small Desimonia | Desimonia | Alien Desimo | Guwam | Goldras | Alien Manon | Dethmon | Faldon | Galra | Bakugon | Iludo | Virtual Alien Muzan II | Virtual Alien Raybeak II | Karen E-90 | Faivas | Geozark | Guarde | Gijera | Terra | Nook | Taraban | Metamorga | Illusion Evolu | Menjura | Charija | Yanakargi | Zoiger | Gatanothor
Ultraman Tiga: The Final Odyssey Shibito Zoiger | Golza Army | Demonzoa
Ultraman Tiga Gaiden: Revival of the Ancient Giant Degouf | Jomonoid | Kurayaminoorochi | Dogouf
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